Mount Sutil
Galiano Island, British ColumbiaMount Sutil
Mount Sutil’s Biodiversity
Last updated January 2018
Presented below is a working list of species known to Mount Sutil, Galiano Island, BC: a mount which rises 290 m above the Trincomali Channel. A broad spectrum of habitats range across Mt. Sutil’s topographic profile, including Garry oak woodlands and associated rock outcrops, dry Douglas-fir forests and several wetland communities. Though it is by no means comprehensive, this species list provides a snapshot of the diversity of species that make their homes in these habitats.
Included on the list are inventories prepared by Hans Roemer, Terry McIntosh (with the help of Curtis Björk and Trevor Goward), Ryan Batten, and, more recently, inventory work conducted by Matt Fairbarns, Keith Erickson and Rene Zich. In addition to these historical records, the list includes recent reports made by Quentin Cronk, Scott Gilmore, Harvey and Pam Janszen, Steve Joya, Olivia Lee, Lauren Magner, James and Kristen Miskelly, Diana Percy, Andrew Simon and Alexander Wright.
Browse the gallery on the right for photographs featuring some of the breathtaking vistas and the diverse species and habitats to be appreciated on Mt. Sutil. The following list is queryable and can be sorted by scientific name, common name, group, family, conservation status and provenance.
Mount Sutil
Sunny skies, looking northwest toward the Trincomali Channel
Mount Sutil
Herbaceous communities on a steep southwest-facing slope
Mount Sutil
Fog rising on Mount Sutil's steep slopes
Mt. Sutil
View looking northwest. Visible in the Trincomali Channel below: Parker and Julia Island (the latter barely visible) and Phillimore Point
Mt. Sutil
View looking southeast over Salt Spring and Prevost Islands
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Scientific Name | Common name | Group/Habit | Family | Status | Observer(s) |
|---|---|---|---|---|---|
| Abies grandis | grand fir | trees | Pinaceae | S5 (2015) | K. Erickson (2016); M. Fairbarns (2016); A. Simon (2017) |
| Acer glabrum var. douglasii | Douglas’ maple | trees | Sapindaceae | S5 (2015) | K. Erickson (2016) |
| Acer macrophyllum | bigleaf maple | trees | Sapindaceae | S5 (2015) | M. Fairbarns (2016); A. Simon (2017) |
| Achillea millefolium | common yarrow | herbs | Asteraceae | exotic | H. Roemer (2004); K. Erickson (2016); M. Fairbarns (2016) |
| Achlys triphylla | vanilla leaf | herbs | Berberidaceae | S5 (2015) | K. Erickson (2016) |
| Achnatherum lemmonii var. lemmonii | Lemmon’s needlegrass | grasses, sedges and rushes | Poaceae | S4? (2015) | H. Roemer (2004); M. Fairbarns (2016); A. Simon (2017) |
| Acmispon parviflorus | short-flower deervetch | herbs | Fabaceae | S3S4 (2015) | H. Roemer (2004); M. Fairbarns (2016); A. Simon (2017) |
| Adela trigrapha | Three-striped Longhorn | butterflies & moths | Adelidae | unlisted | S. Gilmore (2017) |
| Aeshna multicolor | blue-eyed darner | damselflies and dragonflies | Aeshnidae | unlisted | R. Zich (2016) |
| Agaricus augustus | fungi | Agaricaceae | unlisted | A. Simon (2017) | |
| Agathidium maculosum | beetles | Leiodidae | SU (2017) | S. Gilmore (2017) | |
| Agoseris grandiflora | large-flowered agoseris | herbs | Asteraceae | S5 (2015) | H. Roemer (2004); M. Fairbarns (2016) |
| Agrostis sp. | grasses, sedges and rushes | Poaceae | — | K. Erickson (2016) | |
| Agulla adnixa | snake fly | flies | Raphidiidae | unlisted | A. Simon & S. Gilmore (2018) |
| Aira caryophyllea | silver hairgrass | grasses, sedges and rushes | Poaceae | exotic | H. Roemer (2004); M. Fairbarns (2016); A. Simon (2017) |
| Aira praecox | early hair grass | grasses, sedges and rushes | Poaceae | exotic | H. Roemer (2004); M. Fairbarns (2016); A. Simon (2017) |
| Allium acuminatum | Hooker's onion | herbs | Alliaceae | S5 (2015) | H. Roemer (2004); M. Fairbarns (2016); R. Zich (2016); A. Simon (2017) |
| Allium cernuum | nodding onion | herbs | Alliaceae | S5 (2015) | H. Roemer (2004); M. Fairbarns (2016); A. Simon (2017) |
| Alnus rubra | red alder | trees | Betulaceae | S5 (2015) | K. Erickson (2016); M. Fairbarns (2016) |
| Alopecosa kochi | wolf spider | spiders and ticks | Lycosidae | unlisted | S. Gilmore (2017) |
| Altica sp. | metallic flea beetle | beetles | Chrysomelidae | — | S. Gilmore (2017) |
| Amanita pantherina | fungi | Agaricaceae | unlisted | P. Janszen (2017) | |
| Amelanchier florida | saskatoon | shrubs | Rosaceae | S4S5 (2012) | M. Fairbarns (2016) |
| Amphidium californicum | mosses, liverworts & hornworts | Orthotrichaceae | S4 (2015) | A. Simon (2017) | |
| Anacolia menzeisii | mosses, liverworts & hornworts | Bartramiaceae | unlisted | T. McIntosh (2010); A. Simon (2017) | |
| Anaphalis margaritacea | pearly everlasting | herbs | Asteraceae | S5 (2015) | M. Fairbarns (2016) |
| Anas platyrhynchos | mallard | birds | Anatidae | S5B, S5N (2015) | K. Erickson (2016) |
| Anisocarpus madioides | woodland madia | herbs | Asteraceae | S5? (2015) | A. Simon (2017) |
| Anthocharis sara flora | Sara's Orangetip, Flora Subspecies | butterflies & moths | Pieridae | S4 (2013) | S. Gilmore (2017) |
| Anthoxanthum odoratum | sweet vernal grass | grasses, sedges and rushes | Poaceae | exotic | M. Fairbarns (2016); A. Simon (2017) |
| Anthriscus caucalis | herbs | Apiaceae | exotic | A. Simon (2017) | |
| Antitrichia californica | mosses, liverworts & hornworts | Leucodontaceae | S4 (2015) | T. McIntosh (2010); A. Simon (2017) | |
| Antitrichia curtipendula | pendulous wing-moss | mosses, liverworts & hornworts | Leucodontaceae | S5 (2015) | T. McIntosh (2010); O. Lee (2017); A. Simon (2017) |
| Aphanes arvensis | field parsley-piert | herbs | Rosaceae | exotic | M. Fairbarns (2016) |
| Arbutus menziesii | arbutus | trees | Ericaceae | S4? (2014) | M. Fairbarns (2016); A. Simon (2017) |
| Arthonia polygramma | lichens | Arthoniaceae | unlisted | C. Björk (2010) | |
| Athyrium filix-femina | lady fern | ferns & allies | Athyriaceae | S5 (2015) | K. Erickson (2016) |
| Athysanus pusillus | common sandweed | herbs | Brassicaceae | S3S4 (2015) | M. Fairbarns (2016) |
| Atrichum selwynii | mosses, liverworts & hornworts | Polytrichaceae | S5? (2015) | A. Simon (2017) | |
| Aulacomnium androgynum | lover’s moss | mosses, liverworts & hornworts | Aulacomniaceae | S5 (2015) | O. Lee (2017) |
| Bacidia rubella | lichens | Ramalinaceae | unlisted | C. Björk (2010) | |
| Barbarea orthoceras | herbs | Brassicaceae | exotic | H. Roemer (2004); M. Fairbarns (2016) | |
| Bellis perennis | English daisy | herbs | Asteraceae | exotic | K. Erickson (2016); M. Fairbarns (2016) |
| Berberis aquifolium | Oregon-grape | shrubs | Berberidaceae | S5 (2015) | K. Erickson (2016); M. Fairbarns (2016); A. Simon (2017) |
| Berberis nervosa | dull Oregon-grape | shrubs | Berberidaceae | S5 (2000) | K. Erickson (2016); M. Fairbarns (2016); A. Simon (2017) |
| Blechnum spicant | deer fern | ferns & allies | Blechnaceae | S5 (2015) | K. Erickson (2016) |
| Brachythecium albicans | mosses, liverworts & hornworts | Brachytheciaceae | S4S5 (2015) | T. McIntosh (2010) | |
| Brachythecium sp. | — | mosses, liverworts & hornworts | Brachytheciaceae | — | T. McIntosh (2010) |
| Brodiaea coronaria | crown brodiaea | herbs | Themidaceae | S3S4 (2015) | H. Roemer (2004); M. Fairbarns (2016); R. Zich (2016); A. Simon (2017) |
| Bromus carinatus | California brome | grasses, sedges and rushes | Poaceae | S5 (2015) | H. Roemer (2004); M. Fairbarns (2016) |
| Bromus hordeaceus | soft brome | grasses, sedges and rushes | Poaceae | exotic | H. Roemer (2004); M. Fairbarns (2016); A. Simon (2017) |
| Bromus rigidus | rip-gut Brome | grasses, sedges and rushes | Poaceae | exotic | M. Fairbarns (2016); A. Simon (2017) |
| Bromus sterilis | barren brome | grasses, sedges and rushes | Poaceae | exotic | H. Roemer (2004); M. Fairbarns (2016); A. Simon (2017) |
| Bromus tectorum | cheat grass | grasses, sedges and rushes | Poaceae | exotic | H. Roemer (2004); M. Fairbarns (2016); A. Simon (2017) |
| Bromus vulgaris | Columbia brome | grasses, sedges and rushes | Poaceae | S5 (2015) | K. Erickson (2016); M. Fairbarns (2016) |
| Bryum argenteum | mosses, liverworts & hornworts | Bryaceae | S4S5 (2015) | T. McIntosh (2010) | |
| Buckiella undulata | waved silk-moss | mosses, liverworts & hornworts | Hypnaceae | S4 (2015) | A. Simon (2017) |
| Bucklandiella heterosticha | mosses, liverworts & hornworts | Grimmiaceae | S4S5 (2015) | T. McIntosh (2010); O. Lee (2017); A. Simon (2017) | |
| Bucklandiella macounii | mosses, liverworts & hornworts | Grimmiaceae | S3S4 (2015) | T. McIntosh (2010) | |
| Buprestis aurulenta | golden buprestid | beetles | Buprestidae | S5 (2017) | R. Zich (2016) |
| Buteo jamaicensis | red-tailed hawk | birds | Acciptridae | S5B (2015) | R. Zich (2016) |
| Calandrinia ciliata var. menziesii | desert rock purslane | herbs | Montiaceae | S3S4 (2015) | M. Fairbarns (2016) |
| Calicium salicinum | lichens | Caliciaceae | unlisted | C. Björk (2010) | |
| Callophrys gryneus plicataria | cedar hairstreak | butterflies & moths | Lycaenidae | S4 (2013) | R. Zich (2016); S. Gilmore (2017) |
| Caloplaca cf ferruginea | lichens | Teloschistaceae | — | C. Björk (2010) | |
| Caloplaca cf xanthostigmoidea | lichens | Teloschistaceae | — | C. Björk (2010) | |
| Calypso bulbosa var. occidentalis | fairy slipper | herbs | Orchidaceae | S5 (2000) | M. Fairbarns (2016); K. Erickson (2016); R. Zich (2016) |
| Calypte anna | Anna’s hummingbird | birds | Trochilidae | S4S5B (2015) | K. Erickson (2016) |
| Camassia leichtlinii ssp. suksdorfii | great camas | herbs | Asparagaceae | S4 (2015) | H. Roemer (2004); M. Fairbarns (2016); A. Simon (2017) |
| Campanula scouleri | scouler's harebell | herbs | Campanulaceae | S5 (2000) | K. Erickson (2016); M. Fairbarns (2016); A. Simon (2017) |
| Cardamine hirsuta | hairy bittercress | herbs | Brassicaceae | exotic | K. Erickson (2016); M. Fairbarns (2016); A. Simon (2017) |
| Cardamine oligosperma | little Western bittercress | herbs | Brassicaceae | S5 (2015) | M. Fairbarns (2016); A. Wright (2017); A. Simon (2017) |
| Cardiophorus sp. | — | beetles | Elateridae | — | S. Gilmore (2017) |
| Carex aquatilis var. dives | sitka sedge | grasses, sedges and rushes | Cyperaceae | S5 (2015) | K. Erickson (2016) |
| Carex deweyana | Dewey’s sedge | grasses, sedges and rushes | Cyperaceae | S5 (2015) | K. Erickson (2016); M. Fairbarns (2016) |
| Carex inops var. inops | long-stolon sedge | grasses, sedges and rushes | Cyperaceae | S3S4 (2001) | H. Roemer (2004); A. Simon (2017) |
| Carex leptopoda | slender-footed sedge | grasses, sedges and rushes | Cyperaceae | S5 (2015) | A. Simon (2017) |
| Carex obnupta | slough sedge | grasses, sedges and rushes | Cyperaceae | S5 (2015) | K. Erickson (2016); M. Fairbarns (2016) |
| Carex pellita | woolly sedge | grasses, sedges and rushes | Cyperaceae | S5 (2015) | A. Simon (2017) |
| Castilleja attenuata | valley tassels | herbs | Orobanchaceae | S4? (2015) | M. Fairbarns (2016); J. & K. Miskelly (2017) |
| Castilleja hispida | harsh paintbrush | herbs | Orobanchaceae | S5 (2015) | M. Fairbarns (2016) |
| Castor canadensis | beaver | mammals | Castoridae | S5 (2015) | K. Erickson (2016) |
| Cathartes aura | turkey vulture | birds | Cathartidae | S4 (2015) | R. Zich (2016); A. Simon (2017) |
| Catharus ustulatus | Swainson’s thrush | birds | Turdidae | S5B (2015) | R. Zich (2016) |
| Celastrina echo | western spring azure | butterflies & moths | Lycaenidae | S5 (2013) | R. Zich (2016) |
| Cephaloziella sp. | — | mosses, liverworts & hornworts | Cephaloziellaceae | — | T. McIntosh (2010) |
| Cerastium arvense | field chickweed | herbs | Caryophyllaceae | exotic | H. Roemer (2004); M. Fairbarns (2016); K. Erickson (2016); R. Zich (2016); A. Simon (2017) |
| Ceratodon purpureus | fire moss | mosses, liverworts & hornworts | Ditrichaceae | S5 (2015) | T. McIntosh (2010); R. Batten (2013); A. Simon (2017) |
| Chlorochroa rossiana | stink bug | true bugs | Pentatomidae | unlisted | S. Gilmore (2017) |
| Chordeiles minor | common nighthawk | birds | Caprimulgidae | S4B (2015) | A. Simon (2017) |
| Cicuta douglasii | Douglas’ water-hemlock | herbs | Apiaceae | S5 (2015) | K. Erickson (2016) |
| Cirsium arvense | Canada thistle | herbs | Asteraceae | exotic | K. Erickson (2016) |
| Cirsium brevistylum | short-styled thistle | herbs | Asteraceae | S5? (2015) | A. Simon (2017) |
| Cirsium vulgare | bull thistle | herbs | Asteraceae | exotic | H. Roemer (2004); K. Erickson (2016); M. Fairbarns (2016) |
| Cladina portentosa | reindeer lichen | lichens | Cladoniaceae | S5 (2010) | A. Simon (2017) |
| Cladonia coniocraea | common powderhorn | lichens | Cladoniaceae | S5 (2010) | A. Simon (2017) |
| Cladonia furcata | many-forked cladonia | lichens | Cladoniaceae | S5 (2010) | A. Simon (2017) |
| Cladonia scabriuscula | card-carrying pixie | lichens | Cladoniaceae | S5 (2010) | A. Simon (2017) |
| Cladonia squamosa | dragon pixie | lichens | Cladoniaceae | S5 (2010) | A. Simon (2017) |
| Cladonia transcendens | graduated pixie | lichens | Cladoniaceae | S4 (2010) | A. Simon (2017) |
| Cladonia verruculosa | nitty-gritty pixie | lichens | Cladoniaceae | S4 (2010) | A. Simon (2017) |
| Claopodium bolanderi | mosses, liverworts & hornworts | Thuidiaceae | S4S5 (2015) | A. Simon (2017) | |
| Claopodium crispifolium | mosses, liverworts & hornworts | Thuidiaceae | S4S5 (2015) | T. McIntosh (2010); A. Simon (2017) | |
| Clarkia amoena var. caurina | herbs | Onagraceae | S3S4 (2012) | H. Roemer (2004); M. Fairbarns (2016); A. Simon (2017) | |
| Claytonia exigua | serpentine springbeauty | herbs | Montiaceae | S3S4 (2001) | A. Simon (2017) |
| Claytonia exigua ssp. glauca | pallid serpentine spring beauty | herbs | Montiaceae | S4 (2008) | R. Batten (2013) |
| Claytonia perfoliata | miner’s lettuce | herbs | Montiaceae | S4 (2001) | K. Erickson (2016); M. Fairbarns (2016); A. Simon (2017) |
| Claytonia rubra ssp. depressa | redstem springbeauty | herbs | Montiaceae | S3S4 (2005) | M. Fairbarns (2016); A. Simon (2017) |
| Claytonia sibirica | Siberian miner’s lettuce | herbs | Montiaceae | S5 (2015) | K. Erickson (2016) |
| Clinopodium douglasii | yerba buena | herbs | Lamiaceae | S5 (2015) | K. Erickson (2016); A. Simon (2017) |
| Cliostomum griffithii | multicolored dot lichen | lichens | Ramalinaceae | unlisted | C. Björk (2010) |
| Collema nigrescens | blistered jelly lichen | lichens | Collemataceae | S4 (2010) | A. Simon (2017) |
| Collema subflaccidum | wilted tarpaper | lichens | Collemataceae | S4 (2010) | C. Björk (2010) |
| Collinsia grandiflora | giant blue-eyed Mary | herbs | Plantaginaceae | S4 (2015) | A. Simon (2017) |
| Collinsia parviflora | maiden blue-eyed Mary | herbs | Plantaginaceae | S5 (2015) | H. Roemer (2004); A. Simon (2017) |
| Collomia heterophylla | variableleaf collomia | herbs | Polemoniaceae | S5 (2015) | A. Simon (2017) |
| Contopus cooperi | olive-sided flycatcher | birds | Tyrannidae | S3S4B (2015) | R. Zich (2016) |
| Coprinellus sp. | inky cap | fungi | Psathyrellaceae | — | A. Simon (2017) |
| Coprinus comatus | shaggy mane | fungi | Agaricaceae | unlisted | A. Simon (2017) |
| Corallorhiza maculata var. occidentalis | western spotted coralroot | herbs | Orchidaceae | SU (2012) | K. Erickson (2016); M. Fairbarns (2016); A. Simon (2017) |
| Cornus nuttallii | Pacific dogwood | shrubs | Cornaceae | S5 (2015) | K. Erickson (2016) |
| Corvus corax | common raven | birds | Corvidae | S5B (2015) | R. Zich (2016) |
| Crataegus monogyna | common hawthorn | shrubs | Rosaceae | exotic | K. Erickson (2016); M. Fairbarns (2016) |
| Ctenophora vittata | flies | Tipulidae | unlisted | S. Gilmore (2017) | |
| Cycloneda polita | western spotless ladybeetle | beetles | Coccinellidae | S5 (2017) | S. Gilmore (2017) |
| Cylindrocopturus furnissi | Douglas-fir twig weevil | beetles | Curculionidae | SU (2017) | S. Gilmore (2017) |
| Cynosurus echinatus | bristly dogtail grass | grasses, sedges and rushes | Poaceae | exotic | H. Roemer (2004); K. Erickson (2016); M. Fairbarns (2016); A. Simon (2017) |
| Cyphelium inquinans | cupped soot lichen | lichens | unlisted | A. Simon (2017) | |
| Cystopteris fragilis | fragile fern | ferns & allies | Dryopteridaceae | S5 (2015) | M. Fairbarns (2016) |
| Cytisus scoparius | Scotch broom | shrubs | Fabaceae | exotic | H. Roemer (2004); K. Erickson (2016); M. Fairbarns (2016); R. Zich (2016); A. Simon (2017) |
| Dactylis glomerata | orchard grass | grasses, sedges and rushes | Poaceae | exotic | K. Erickson (2016); M. Fairbarns (2016) |
| Dalopius sp. | — | beetles | Elateridae | — | S. Gilmore (2017) |
| Danthonia californica | California oat grass | grasses, sedges and rushes | Poaceae | S5? (2015) | H. Roemer (2004); M. Fairbarns (2016); A. Simon (2017) |
| Daphne laureola | spurge-laurel | shrubs | Thymelaceae | exotic | M. Fairbarns (2016) |
| Daucus pusillus | American wild carrot | herbs | Apiaceae | S5 (2000) | H. Roemer (2004); K. Erickson (2016); M. Fairbarns (2016); A. Simon (2017) |
| Delphinium menziesii | Puget Sound larkspur | herbs | Ranunculaceae | S4? (2015) | K. Erickson (2016); M. Fairbarns (2016); A. Simon (2017) |
| Dendragapus fuliginosus | sooty grouse | birds | Phasianidae | S4 (2015) | A. Simon (2017) |
| Dendroalsia abietina | mosses, liverworts & hornworts | Leucodontaceae | S3S4 (2015) | T. McIntosh (2010); O. Lee (2017) | |
| Dendroica coronata | yellow-rumped warbler | birds | Parulidae | S5B (2015) | R. Zich (2016) |
| Dendroica townsendi | Townsend’s warbler | birds | Parulidae | S5B (2015) | R. Zich (2016) |
| Dermatocarpon leptophyllodes | jigsaw stippleback | lichens | Umbilicariaceae | S4 (2018) | A. Simon (2018) |
| Dermatocarpon reticulatum | sandpaper stippleback | lichens | Verrucariaceae | S4S5 (2010) | A. Simon (2017) |
| Dicerca tenebrosa | dark jewel beetle | beetles | Buprestidae | S4S5 (2017) | S. Gilmore (2017) |
| Dicranoweisia cirrata | common pincushion | mosses, liverworts & hornworts | Dicranaceae | S3S4 (2015) | O. Lee (2017); A. Simon (2017) |
| Dicranum fuscescens | dusky fork moss | mosses, liverworts & hornworts | Dicranaceae | S5 (2015) | A. Simon (2017) |
| Dicranum scoparium | broom moss | mosses, liverworts & hornworts | Dicranaceae | S5 (2015) | H. Roemer (2004); T. McIntosh (2010); O. Lee (2017); A. Simon (2017) |
| Dicranum tauricum | fragile fork moss | mosses, liverworts & hornworts | Dicranaceae | S5 (2015) | A. Simon (2017) |
| Didymodon eckeliae | mosses, liverworts & hornworts | Pottiaceae | S4 (2015) | T. McIntosh (2010) | |
| Didymodon norrisii | — | mosses, liverworts & hornworts | Pottiaceae | S1S3 (2015) | T. McIntosh (2010) |
| Didymodon vinealis | soft-tufted beard moss | mosses, liverworts & hornworts | Pottiaceae | S5 (2015) | T. McIntosh (2010); O. Lee (2017) |
| Digitalis purpurea | foxglove | herbs | Plantaginaceae | exotic | K. Erickson (2016); R. Zich (2016); A. Simon (2017) |
| Diploschistes scruposus | crater lichen | lichens | Thelotremataceae | unlisted | A. Simon (2017) |
| Dryocopus pileatus | pileated woodpecker | birds | Picidae | S5 (2015) | R. Zich (2016) |
| Elasmostethus cruciatus | red-cross shield bug | true bugs | Acanthosomatidae | unlisted | S. Gilmore (2017) |
| Elymus glaucus | blue wild rye | grasses, sedges and rushes | Poaceae | S5 (2000) | H. Roemer (2004); K. Erickson (2016); M. Fairbarns (2016); A. Simon (2017) |
| Empidonax difficilis | Pacific-slope flycatcher | birds | Tyrannidae | S5B (2015) | R. Zich (2016) |
| Empidonax traillii | willow flycatcher | birds | Tyrannidae | S5B (2015) | R. Zich (2016) |
| Encalypta sp. | — | mosses, liverworts & hornworts | Encalyptaceae | — | T. McIntosh (2010) |
| Entosthodon sp. (?) | mosses, liverworts & hornworts | Funariaceae | — | T. McIntosh (2010) | |
| Epilobium brachycarpum | panicled willowherb | herbs | Onagraceae | S5 (2015) | H. Roemer (2004) |
| Epilobium foliosum | California willowherb | herbs | Onagraceae | S4S5 (2015) | A. Simon (2017) |
| Epilobium minutum | little willowherb | herbs | Onagraceae | S5 (2015) | M. Fairbarns (2016); A. Simon (2017) |
| Equisetum arvense | common horsetail | ferns & allies | Equisetaceae | S5 (2015) | K. Erickson (2016); M. Fairbarns (2016) |
| Eriophyllum lanatum var. leucophyllum | common woolly sunflower | herbs | Asteraceae | S5 (2015) | H. Roemer (2004); M. Fairbarns (2016); A. Simon (2017) |
| Erodium cicutarium | redstem filaree | herbs | Geraniaceae | exotic | M. Fairbarns (2016); A. Simon (2017) |
| Erynnis propertius | Propertius duskywing | butterflies & moths | Hesperiidae | S2S3 | S. Gilmore (2017) |
| Erythranthe alsinoides | chickweed monkeyflower | herbs | Phrymaceae | S4? (2015) | K. Erickson (2016); M. Fairbarns (2016); A. Simon (2017) |
| Erythranthe microphylla | small-leaved monkeyflower | herbs | Phrymaceae | S4 (2015) | A. Simon (2017) |
| Erythranthe nasuta | seep monkeyflower | herbs | Phrymaceae | S4S5 (2015) | M. Fairbarns (2016); R. Zich (2016); A. Simon (2017) |
| Evernia prunastri | valley oakmoss | lichens | Parmeliaceae | S4S5 (2010) | A. Simon (2017) |
| Festuca occidentalis | western fescue | grasses, sedges and rushes | Poaceae | S5 (2015) | K. Erickson (2016); M. Fairbarns (2016); A. Simon (2017) |
| Festuca roemeri | Roemer's fescue | grasses, sedges and rushes | Poaceae | S4 (2001) | H. Roemer (2004); M. Fairbarns (2016); A. Simon (2017) |
| Festuca rubra | red fescue | grasses, sedges and rushes | Poaceae | exotic | K. Erickson (2016); M. Fairbarns (2016); A. Simon (2017) |
| Filago pyramidata | broad-leaved cudweed | herbs | Asteraceae | unlisted | A. Simon (2017); A. J. Wright (2017) |
| Fissidens bryoides | mosses, liverworts & hornworts | Fissidentaceae | S4S5 (2011) | T. McIntosh (2010) | |
| Fomitopsis pinicola | red-belted conk | fungi | Fomitopsidaceae | unlisted | R. Zich (2016) |
| Fragaria vesca | woodland strawberry | herbs | Rosaceae | S5 (2000) | K. Erickson (2016); M. Fairbarns (2016); A. Simon (2017) |
| Fritillaria affinis var. affinis | chocolate lily | herbs | Liliaceae | S5 (2000) | K. Erickson (2016) |
| Funaria muhlenbergii | mosses, liverworts & hornworts | Funariaceae | S3? (2011) | T. McIntosh (2010); R. Batten (2013) | |
| Galium aparine | cleavers | herbs | Rubiaceae | S5 (2015) | H. Roemer (2004); K. Erickson (2016); M. Fairbarns (2016); A. Simon (2017) |
| Galium triflorum | sweet-scented bedstraw | herbs | Rubiaceae | S5 (2015) | K. Erickson (2016); M. Fairbarns (2016) |
| Gaultheria shallon | salal | shrubs | Ericaceae | S5 (2015) | M. Fairbarns (2016); A. Simon (2017) |
| Geastrum sp. | earthstars | fungi | Geastraceae | — | A. Simon (2017) |
| Geranium dissectum | cut-leaved crane's-bill | herbs | Geraniaceae | exotic | A. Simon (2017) |
| Geranium molle | dove's-foot crane's-bill | herbs | Geraniaceae | exotic | H. Roemer (2004); A. Simon (2017) |
| Goodyera oblongifolia | western rattlesnake plantain | herbs | Orchidaceae | S5 (2015) | K. Erickson (2016); A. Simon (2017) |
| Grimmia trichophylla | mosses, liverworts & hornworts | Grimmiaceae | S4S5 (2015) | T. McIntosh (2010); O. Lee (2017) | |
| Grindelia hirsutula var. hirsutula | hairy gumweed | herbs | Asteraceae | S3S4 (2015) | M. Fairbarns (2016); A. Simon (2017) |
| Haliaeetus leucocephalus | bald eagle | birds | Acciptridae | S5B,S5N (2015) | K. Erickson (2016); R. Zich (2016) |
| Hedwigia stellata | mosses, liverworts & hornworts | Hedwigiacea | S3S4 (2015) | T. McIntosh (2010); O. Lee (2017); A. Simon (2017) | |
| Helops sp. | — | beetles | Tenebrionidae | — | S. Gilmore (2017) |
| Heuchera micrantha var. diversifolia | crevice alumroot | herbs | Saxifragaceae | S4 (2015) | K. Erickson (2016); M. Fairbarns (2016); A. Simon (2017) |
| Hieracium albiflorum | white hawkweed | herbs | Asteraceae | S5 (2015) | K. Erickson (2016) |
| Holcus lanatus | common velvet grass | grasses, sedges and rushes | Poaceae | exotic | K. Erickson (2016); M. Fairbarns (2016); A. Simon (2017) |
| Holodiscus discolor | ocean spray | shrubs | Rosaceae | S5 (2015) | K. Erickson (2016); M. Fairbarns (2016); A. Simon (2017) |
| Homalothecium aenium | mosses, liverworts & hornworts | Brachytheciaceae | unlisted | T. McIntosh (2010) | |
| Homalothecium aureum | mosses, liverworts & hornworts | Brachytheciaceae | unlisted | T. McIntosh (2010); A. Simon (2017) | |
| Homalothecium fulgescens | mosses, liverworts & hornworts | Brachytheciaceae | S4S5 (2011) | T. McIntosh (2010); A. Simon (2017) | |
| Homalothecium megaptilum | mosses, liverworts & hornworts | Brachytheciaceae | S4? (2015) | H. Roemer (2004); T. McIntosh (2010); O. Lee (2017); A. Simon (2017) | |
| Homalothecium nuttallii | mosses, liverworts & hornworts | Brachytheciaceae | S4S5 (2015) | T. McIntosh (2010); O. Lee (2017); A. Simon (2017) | |
| Hylocomium splendens | glittering wood-moss | mosses, liverworts & hornworts | Hylocomiaceae | S5 (2015) | T. McIntosh (2010); K. Erickson (2016); A. Simon (2017) |
| Hypnum circinale | mosses, liverworts & hornworts | Hypnaceae | S5 (2015) | A. Simon (2017) | |
| Hypnum subimponens | mosses, liverworts & hornworts | Hypnaceae | S4S5 (2015) | T. McIntosh (2010) | |
| Hypochaeris glabra | smooth cat's ear | herbs | Asteraceae | exotic | H. Roemer (2004); M. Fairbarns (2016); A. Simon (2017) |
| Hypochaeris radicata | hairy cat's ear | herbs | Asteraceae | exotic | H. Roemer (2004); K. Erickson (2016); M. Fairbarns (2016); A. Simon (2017) |
| Hypogymnia apinnata | beaded sleave | lichens | Parmeliaceae | S5 (2010) | A. Simon (2017) |
| Hypogymnia enteromorpha | inflatable bone | lichens | Parmeliaceae | S5 (2010) | A. Simon (2017) |
| Hypogymnia imshaugii | forking bone | lichens | Parmeliaceae | S5 (2010) | A. Simon (2017) |
| Hypogymnia occidentalis | budding bone | lichens | Parmeliaceae | S5 (2010) | A. Simon (2017) |
| Hypogymnia physodes | monk’s hood | lichens | Parmeliaceae | S5 (2010) | A. Simon (2017) |
| Hypogymnia tubulosa | dog bone | lichens | Parmeliaceae | S5 (2010) | A. Simon (2017) |
| Idahoa scapigera | scalepod | herbs | Brassicaceae | S2S3 (2015) | R. Batten (2013); M. Fairbarns (2016) |
| Ilex aquifolium | holly | shrubs | Aquifoliaceae | exotic | K. Erickson (2016); M. Fairbarns (2016) |
| Imbribryum miniatum | mosses, liverworts & hornworts | Bryaceae | S4S5 (2015) | T. McIntosh (2010); A. Simon (2017) | |
| Imbribryum torenii | mosses, liverworts & hornworts | Bryaceae | unlisted | A. Simon (2017) | |
| Isothecium cristatum | mosses, liverworts & hornworts | Brachytheciaceae | S4? (2011) | T. McIntosh (2010); O. Lee (2017); A. Simon (2017) | |
| Isothecium stoloniferum | mosses, liverworts & hornworts | Brachytheciaceae | S4S5 (2015) | T. McIntosh (2010) | |
| Ixoreus naevius | varied thrush | birds | Turdidae | S5B (2015) | R. Zich (2016) |
| Jacobaea vulgaris | tansy ragwort | herbs | Asteraceae | exotic | K. Erickson (2016); M. Fairbarns (2016); A. Simon (2017) |
| Junco hyemalis | Oregon dark-eyed junco | birds | Emberizidae | S5B (2015) | R. Zich (2016) |
| Juncus effusus | European rush | grasses, sedges and rushes | Juncaceae | exotic | K. Erickson (2016); M. Fairbarns (2016) |
| Kindbergia oregana | mosses, liverworts & hornworts | Brachytheciaceae | S5 (2015) | T. McIntosh (2010); K. Erickson (2016); O. Lee (2017); A. Simon (2017) | |
| Kindbergia praelonga | mosses, liverworts & hornworts | Brachytheciaceae | S5 (2015) | T. McIntosh (2010); K. Erickson (2016) | |
| Koeleria macrantha | June grass | grasses, sedges and rushes | Poaceae | S5 (2000) | A. Simon (2017) |
| Laccaria amethysteo-occidentalis | fungi | Hydnangiaceae | unlisted | A. Simon (2017) | |
| Lamium purpureum | red deadnettle | herbs | Lamiaceae | exotic | A. Simon (2017) |
| Lasioglossum sp. | base-banded furrow bee | ants, bees, wasps, sawflies | Halictidae | — | A. Simon (2017) |
| Lathyrus nevadensis var. pilosellus | purple pea vine | herbs | Fabaceae | S5 (2000) | K. Erickson (2016) |
| Lathyrus sylvestris | narrow-leaved everlasting peavine | herbs | Fabaceae | exotic | M. Fairbarns (2016) |
| Lecanora hagenii | lichens | Lecanoraceae | unlisted | C. Björk (2010) | |
| Lecanora hybocarpa | lichens | Lecanoraceae | unlisted | C. Björk (2010) | |
| Lecanora pacifica | lichens | Lecanoraceae | unlisted | C. Björk (2010) | |
| Lecidea albofuscescens | lichens | Lecideaceae | unlisted | C. Björk (2010) | |
| Lemna minor | common duckweed | aquatic plants | Araceae | S5 (2015) | K. Erickson (2016) |
| Lemna turionifera | Turion duckweed | aquatic plants | Araceae | S4S5 (2015) | A. Simon (2017); A. J. Wright (2017) |
| Lepidium virginicum | tall peppergrass | herbs | Brassicaceae | S5 (2015) | M. Fairbarns (2016) |
| Leptarctia californiae | California tiger moth | butterflies & moths | Erebidae | unlisted | S. Gilmore (2017) |
| Leptogium cf turgidum | lichens | Collemataceae | — | C. Björk (2010) | |
| Leptogium gelatinosum | rose-petalled vinyl | lichens | Collemataceae | S4S5 (2010) | A. Simon (2017) |
| Leptogium lichenoides | tattered vinyl | lichens | Collemataceae | S5 (2010) | C. Björk (2010); A. Simon (2017) |
| Leptogium palmatum | antlered vinyl | lichens | Collemataceae | S5 (2010) | C. Björk (2010); A. Simon (2017) |
| Leptogium platynum | batwing vinyl | lichens | Collemataceae | S1S2 (2010); Endangered (SARA) | R. Batten (2013) |
| Leptogium plicatile | starfish vinyl | lichens | Collemataceae | S3? (2010) | R. Batten (2013) |
| Leptosiphon minimus | bicoloured linanthus | herbs | Polemoniaceae | S4 (2015) | M. Fairbarns (2016) |
| Letharia vulpina | valley wolf | lichens | Parmeliaceae | S5 (2018) | A. Simon (2018) |
| Leucanthemum vulgare | ox-eye daisy | herbs | Asteraceae | exotic | K. Erickson (2016); R. Zich (2016); A. Simon (2017) |
| Leucolepis acanthoneuron | Menzies’ tree moss | mosses, liverworts & hornworts | Mniaceae | S5? (2015) | T. McIntosh (2010); K. Erickson (2016) |
| Lichenomphalia umbellifera | heath navel | lichens | Hygrophoraceae | unlisted | A. Simon (2017) |
| Linnaea borealis | twinflower | herbs | Caprifoliaceae | S3S4 (2001) | K. Erickson (2016) |
| Listrus sp. | — | beetles | Melyridae | — | S. Gilmore (2017) |
| Lithophragma parviflorum | smallflower woodland star | herbs | Saxifragaceae | S5 (2015) | K. Erickson (2016); M. Fairbarns (2016); A. Simon (2017) |
| Lobaria pulmonaria | lungwort | lichens | Lobariaceae | S5 (2010) | C. Björk (2010); A. Simon (2017) |
| Lobaria scrobiculata | textured lung lichen | lichens | Lobariaceae | S4 (2010) | A. Simon (2017) |
| Lomatium utriculatum | spring-gold | herbs | Apiaceae | S5 (2000) | H. Roemer (2004); K. Erickson (2016); M. Fairbarns (2016); R. Zich (2016); A. Simon (2017) |
| Lonicera ciliosa | orange honeysuckle | shrubs | Caprifoliaceae | S5 (2000) | K. Erickson (2016) |
| Lonicera hispidula | hairy honeysuckle | shrubs | Caprifoliaceae | S5 (2000) | H. Roemer (2004); K. Erickson (2016); M. Fairbarns (2016); A. Simon (2017) |
| Lophocampa argentata | silver-spotted tiger moth | butterflies & moths | Erebidae | unlisted | S. Gilmore (2017) |
| Loxia curvirostra | red crossbill | birds | Fringillidae | S5 (2015) | E. Andrusiak & A. Simon (2017) |
| Lupinus bicolor | miniature lupin | herbs | Fabaceae | S4? (2015) | H. Roemer (2004); M. Fairbarns (2016); A. Simon (2017) |
| Lupinus polycarpus | small-flower lupine | herbs | Fabaceae | S4 (2001) | R. Zich (2016); A. Simon (2017); J. & K. Miskelly (2017) |
| Luzula macrantha | grasses, sedges and rushes | Juncaceae | S1S2 (2017) | A. Simon (2017); A. J. Wright (2017) | |
| Luzula subsessilis | short-stalked woodrush | grasses, sedges and rushes | Juncaceae | S5 (2000) | K. Erickson (2016); M. Fairbarns (2016); A. Simon (2017) |
| Lysichiton americanus | skunk cabbage | herbs | Araceae | S5 (2000) | K. Erickson (2016) |
| Lysimachia latifolia | broad-leaved starflower | herbs | Primulaceae | S4S5 (2015) | K. Erickson (2016); M. Fairbarns (2016); A. Simon (2017) |
| Madia gracilis | slender tarweed | herbs | Asteraceae | S3S4 (2001) | H. Roemer (2004); K. Erickson (2016); M. Fairbarns (2016); A. Simon (2017) |
| Massalongia carnosa | moss liver | lichens | Massalongiaceae | S4 (2010) | A. Simon (2017) |
| Meconella oregana | Oregon meconella | herbs | Papaveraceae | S1 (2015) | R. Batten (2014) |
| Melanolophia imitata | western carpet moth | butterflies & moths | Geometridae | unlisted | S. Gilmore (2017) |
| Melica harfordii | Harford’s oniongrass | grasses, sedges and rushes | Poaceae | S3S4 (2015) | H. Roemer (2004); A. Simon (2017) |
| Melica subulata | Alaska oniongrass | grasses, sedges and rushes | Poaceae | S5 (2000) | H. Roemer (2004); K. Erickson (2016); M. Fairbarns (2016); A. Simon (2017) |
| Mesoleuca gratulata | western white-ribboned carpet moth | butterflies & moths | Geometridae | unlisted | R. Zich (2016) |
| Metaneckera menziesii | mosses, liverworts & hornworts | Neckeraceae | S4S5 (2015) | T. McIntosh (2010); O. Lee (2017) | |
| Micranthes integrifolia | grassland saxifrage | herbs | Saxifragaceae | S4 (2001) | M. Fairbarns (2016); A. Simon (2017) |
| Microsteris gracilis | pink twink | herbs | Polemoniaceae | S5 (2015) | H. Roemer (2004) |
| Moehringia macrophylla | big-leaved sandwort | herbs | Caryophyllaceae | S4 (2015) | K. Erickson (2016); M. Fairbarns (2016); A. Simon (2017) |
| Montia fontana | blinks | herbs | Montiaceae | S4? (2015) | M. Fairbarns (2016); A. Simon (2017) |
| Montia linearis | narrow-leaved Montia | herbs | Montiaceae | S5? (2015) | M. Fairbarns (2016) |
| Montia parvifolia | small-leaved blinks | herbs | Montiaceae | S4 (2001) | K. Erickson (2016); M. Fairbarns (2016); A. Simon (2017) |
| Mulsantina picta | painted ladybird | beetles | Coccinellidae | S5 (2017) | S. Gilmore (2017) |
| Mycelis muralis | wall-lettuce | herbs | Asteraceae | exotic | K. Erickson (2016); M. Fairbarns (2016); A. Simon (2017) |
| Myosotis arvensis | field forget-me-not | herbs | Boraginaceae | exotic | M. Fairbarns (2016); A. Simon (2017) |
| Myosotis discolor | changing forget-me-not | herbs | Boraginaceae | exotic | H. Roemer (2004); A. Simon (2017) |
| Nemophila parviflora | small-flowered nemophila | herbs | Boraginaceae | S5 (2000) | M. Fairbarns (2016); A. Simon (2017) |
| Neottia cordata | heart-leaved twayblade | herbs | Orchidaceae | S4S5 (2015) | K. Erickson (2016) |
| Nephroma parile | powdered paw | lichens | Nephromataceae | S5 (2010) | C. Björk (2010) |
| Niphotrichum elongatum | Long Fringe-moss | mosses, liverworts & hornworts | Grimmiaceae | S4S5 (2015) | T. McIntosh (2010); K. Erickson (2016); O. Lee (2017); A. Simon (2017) |
| Nogopterium gracile | mosses, liverworts & hornworts | Leucodontaceae | S2 (2015) | S. Joya (2017); O. Lee (2017); A. Simon (2017) | |
| Nolanea sp. | fungi | Entolomataceae | unlisted | A. Simon (2017) | |
| Normandina pulchella | elf ear | lichens | Verrucariaceae | unlisted | C. Björk (2010) |
| Nostoc sp. | star jelly | cyanobacteria | Nostocaceae | — | A. Simon (2017) |
| Nuphar polysepala | rocky mountain pond lily | aquatic plants | Nymphaeaceae | S5 (2000) | K. Erickson (2016) |
| Ochrolechia farinaria | lichens | incertae sedis | unlisted | C. Björk (2010) | |
| Ochrolechia sp nov. | — | lichens | incertae sedis | — | C. Björk (2010) |
| Odocoileus hemionus columbianus | Columbian black-tailed deer | mammals | Cervidae | S5 (2015) | A. Simon (2017) |
| Opegrapha varia | lichens | Roccellaceae | unlisted | C. Björk (2010) | |
| Orobanche uniflora | one-flowered cancer-root | herbs | Orobanchaceae | S4 (2015) | M. Fairbarns (2016); A. Simon (2017) |
| Orthotrichum consimile | mosses, liverworts & hornworts | Orthotrichaceae | S4S5 (2015) | A. Simon (2017) | |
| Orthotrichum lyellii | Lyell’s bristle-moss | mosses, liverworts & hornworts | Orthotrichaceae | S4S5 (2015) | T. McIntosh (2010); A. Simon (2017) |
| Orthotrichum rupestre | Rock Bristle-moss | mosses, liverworts & hornworts | Orthotrichaceae | S4 (2015) | S. Joya (2017); O. Lee (2017); A. Simon (2017) |
| Osmorhiza berteroi | mountain sweet cicely | herbs | Apiaceae | S5 (2015) | H. Roemer (2004); K. Erickson (2016); M. Fairbarns (2016); A. Simon (2017) |
| Papilio eurymedon | pale swallowtail | butterflies & moths | Papilionidae | S5 (2013) | R. Zich (2016) |
| Papilio rutulus | western tiger swallowtail | butterflies & moths | Papilionidae | S5 (2013) | R. Zich (2016) |
| Parmelia saxatilis | pebbled crottle | lichens | Parmeliaceae | S5 (2010) | A. Simon (2017) |
| Parmelia sulcata | hammered crottle | lichens | Parmeliaceae | S5 (2010) | C. Björk (2010); A. Simon (2017) |
| Parmotrema arnoldii | king ruffle | lichens | Parmeliaceae | S4 (2010) | A. Simon (2017) |
| Peltigera britannica | freckle pelt | lichens | Peltigeraceae | S5 (2010) | A. Simon (2017) |
| Peltigera collina | tree pelt | lichens | Peltigeraceae | S4S5 (2010) | T. McIntosh (2010); A. Simon (2017) |
| Peltigera leucophlebia | ruffled pelt | lichens | Peltigeraceae | S5 (2010) | A. Simon (2017) |
| Peltigera membranacea | diamond pelt | lichens | Peltigeraceae | S5 (2010) | A. Simon (2017) |
| Peltigera neopolydactyla | undulating pelt | lichens | Peltigeraceae | S4S5 (2010) | A. Simon (2017) |
| Peltigera rufescens | black-bellied pelt | lichens | Peltigeraceae | S5 (2010) | A. Simon (2017) |
| Pentagramma triangularis | goldenback fern | ferns & allies | Pteridaceae | S4S5 (2015) | H. Roemer (2004); K. Erickson (2016); M. Fairbarns (2016); A. Simon (2017) |
| Perideridia gairdneri var. montana | common yampeh | herbs | Apiaceae | S3S4 | M. Fairbarns (2016) |
| Phacelia linearis | linearleaf phacelia | herbs | Boraginaceae | S5 (2015) | Q. Cronk & D. Percy (2017); J.&K. Miskelly (2017); A. Simon (2017) |
| Philaenus cf spumaria | meadow frog-hopper | true bugs | Aphrophoridae | — | R. Zich (2016) |
| Philonotis capillaris | mosses, liverworts & hornworts | Bartramiaceae | S4 (2015) | A. Simon (2017) | |
| Philonotis fontana | fountain apple-moss | mosses, liverworts & hornworts | Bartramiaceae | S5 (2015) | A. Simon (2017) |
| Phlyctis argena | whitewash lichen | lichens | Phlyctidaceae | unlisted | A. Simon (2017) |
| Physcia adscendens | hooded rosette lichen | lichens | Physciaceae | S5 (2010) | A. Simon (2017) |
| Physconia enteroxantha | gilded frost | lichens | Physciaceae | S4S5 (2010) | A. Simon (2017) |
| Piperia transversa | royal rein orchid | herbs | Orchidaceae | S3S4 (2001) | A. Simon (2017) |
| Pipilo maculatus | spotted towhee | birds | Emberizidae | S5 (2015) | R. Zich (2016) |
| Plagiomnium insigne | badge moss | mosses, liverworts & hornworts | Mniaceae | S4S5 (2015) | K. Erickson (2016); A. Simon (2017) |
| Plagiomnium venustum | magnificent moss | mosses, liverworts & hornworts | Mniaceae | S4S5 (2015) | A. Simon (2017) |
| Plantago lanceolata | English plantain | herbs | Plantaginaceae | exotic | M. Fairbarns (2016); A. Simon (2017) |
| Platismatia glauca | ragbag | lichens | Parmeliaceae | S5 (2010) | A. Simon (2017) |
| Platismatia herrei | tattered rag | lichens | Parmeliaceae | S5 (2010) | A. Simon (2017) |
| Platycotis vittata | oak treehopper | true bugs | Membracidae | unlisted | S. Gilmore (2017) |
| Plectritis congesta | seablush | herbs | Caprifoliaceae | S5 (2015) | K. Erickson (2016); M. Fairbarns (2016); A. Simon (2017) |
| Pleuridium acuminatum | mosses, liverworts & hornworts | Ditrichaceae | SU (2015) | A. Simon (2017) | |
| Poa annua | annual bluegrass | grasses, sedges and rushes | Poaceae | exotic | M. Fairbarns (2016) |
| Poa compressa | flattened meadowgrass | grasses, sedges and rushes | Poaceae | exotic | A. Simon (2017) |
| Poa pratensis | grasses, sedges and rushes | Poaceae | exotic | H. Roemer (2004) | |
| Poa secunda ssp. secunda | Sandberg’s bluegrass | grasses, sedges and rushes | Poaceae | S5 (2000) | M. Fairbarns (2016) |
| Polygonum sp. | knotweed | herbs | Polygonaceae | — | K. Erickson (2016) |
| Polypodium glycyrrhiza | licorice fern | ferns & allies | Polypodiaceae | S5 (2000) | K. Erickson (2016); M. Fairbarns (2016); A. Simon (2017) |
| Polystichum munitum | western sword fern | ferns & allies | Dryopteridaceae | S5 (2015) | K. Erickson (2016); M. Fairbarns (2016); A. Simon (2017) |
| Polytrichum juniperinum | juniper polytrichum moss | mosses, liverworts & hornworts | Polytrichaceae | S5 (2015) | H. Roemer (2004); T. McIntosh (2010); K. Erickson (2016); O. Lee (2017); A. Simon (2017) |
| Polytrichum piliferum | bristly haircap moss | mosses, liverworts & hornworts | Polytrichaceae | S5 (2015) | T. McIntosh (2010); O. Lee (2017); A. Simon (2017) |
| Porella cordaeana | cliff scalewort | mosses, liverworts & hornworts | Porellaceae | unlisted | A. Simon (2017) |
| Primula hendersonii | shooting star | herbs | Primulaceae | S4? (2015) | K. Erickson (2016) |
| Prunus emarginata | bitter cherry | shrubs | Rosaceae | S5 (2015) | M. Fairbarns (2016); K. Erickson (2016); A. Simon (2017) |
| Pseudacris regilla | northern Pacific treefrog | amphibians | Hylidae | S5 (2016) | A. Simon (2017) |
| Pseudobraunia californica | mosses, liverworts & hornworts | Hedwigiaceae | S3S4 (2015) | A. Simon (2017) | |
| Pseudognaphalium stramineum | cotton-batting cudweed | herbs | Asteraceae | exotic | M. Fairbarns (2016) |
| Pseudotsuga menziesii var. menziesii | coast Douglas-fir | trees | Pinaceae | S5 (2000) | H. Roemer (2004); K. Erickson (2016); M. Fairbarns (2016); A. Simon (2017) |
| Pteridium aquilinum var. pubescens | bracken fern | ferns & allies | Dennstaedtiaceae | S5 (2000) | K. Erickson (2016); M. Fairbarns (2016); A. Simon (2017) |
| Ptinus sp. | — | beetles | Ptinidae | — | S. Gilmore (2017) |
| Ptychostomum pseudotriquetrum | long-leaved thread moss | mosses, liverworts & hornworts | Bryaceae | S5 (2015) | O. Lee (2017); A. Simon (2017) |
| Pyrausta semirubralis | crambid moth | butterflies & moths | Crambidae | unlisted | S. & S. Gilmore (2018) |
| Quercus garryana | Garry oak | trees | Fagaceae | S5 (2015) | H. Roemer (2004); K. Erickson (2016); M. Fairbarns (2016); A. Simon (2017) |
| Ramalina cf obtusata | hooded ribbon | lichens | Ramalinaceae | S4 (2010) | C. Björk (2010) |
| Ramalina farinacea | hyphenated ribbon | lichens | Ramalinaceae | S5 (2010) | C. Björk (2010); A. Simon (2017) |
| Rana aurora | red-legged frog | amphibians | Ranidae | S3 (2016) | K. Erickson (2016) |
| Ranunculus occidentalis | western buttercup | herbs | Ranunculaceae | S5 (2000) | H. Roemer (2004); K. Erickson (2016); M. Fairbarns (2016); A. Simon (2017) |
| Ranunculus repens | buttercup | herbs | Ranunculaceae | exotic | K. Erickson (2016) |
| Ranunculus uncinatus | little buttercup | herbs | Ranunculaceae | S5 (2015) | M. Fairbarns (2016) |
| Rhizomnium glabrescens | fan moss | mosses, liverworts & hornworts | Mniaceae | S4S5 (2015) | K. Erickson (2016); A. Simon (2017) |
| Rhytidiadelphus loreus | lanky moss | mosses, liverworts & hornworts | Hylocomiaceae | S5 (2015) | K. Erickson (2016); A. Simon (2017) |
| Rhytidiadelphus triquetrus | electrified cat’s-tail moss | mosses, liverworts & hornworts | Hylocomiaceae | S5 (2015) | T. McIntosh (2010); K. Erickson (2016); O. Lee (2017); A. Simon (2017) |
| Ribes sanguineum | red-flowering current | shrubs | Grossulariaceae | S5 (2015) | K. Erickson (2016); M. Fairbarns (2016) |
| Riccia sp. | — | mosses, liverworts & hornworts | Ricciaceae | — | T. McIntosh (2010) |
| Ricciocarpus natans | purple-fringed riccia | mosses, liverworts & hornworts | Ricciaceae | unlisted | A. Simon & A.J. Wright (2017) |
| Rinodina hallii | lichens | Physciaceae | unlisted | C. Björk (2010) | |
| Rosa gymnocarpa | baldhip rose | shrubs | Rosaceae | S5 | K. Erickson (2016); M. Fairbarns (2016); A. Simon (2017) |
| Rosa nutkana | Nootka rose | shrubs | Rosaceae | S5 | K. Erickson (2016); M. Fairbarns (2016) |
| Rosa rubiginosa | sweet brier | shrubs | Rosaceae | exotic | K. Erickson (2016) |
| Rosulabryum canariense | mosses, liverworts & hornworts | Bryaceae | unlisted | O. Lee (2017); A. Simon (2017) | |
| Rosulabryum capillare | mosses, liverworts & hornworts | Bryaceae | S4S5 (2015) | A. Simon (2017) | |
| Rubus armeniacus | Himalayan blackberry | shrubs | Rosaceae | exotic | K. Erickson (2016); M. Fairbarns (2016) |
| Rubus laciniatus | cutleaf blackberry | shrubs | Rosaceae | exotic | K. Erickson (2016) |
| Rubus leucodermis | blackcap raspberry | shrubs | Rosaceae | S5 (2015) | K. Erickson (2016); M. Fairbarns (2016); A. Simon (2017) |
| Rubus parviflorus | thimble berry | shrubs | Rosaceae | S5 (2015) | K. Erickson (2016) |
| Rubus spectabilis | salmonberry | shrubs | Rosaceae | S5 (2015) | K. Erickson (2016); H. Roemer (2004); A. Simon (2017) |
| Rubus ursinus | trailing blackberry | shrubs | Rosaceae | S5 (2015) | K. Erickson (2016) |
| Rumex acetosella | sheep’s sorel | herbs | Polygonaceae | exotic | H. Roemer (2004); K. Erickson (2016); M. Fairbarns (2016); A. Simon (2017) |
| Rumex crispus | curled dock | herbs | Polygonaceae | exotic | K. Erickson (2016) |
| Salix lasiandra var. lasiandra | Pacific willow | shrubs | Salicaceae | S5 (2000) | M. Fairbarns (2016) |
| Salix scouleriana | Scouler’s willow | shrubs | Salicaceae | S5 (2015) | K. Erickson (2016) |
| Sambucus racemosa var. arborescens | red elderberry | shrubs | Adoxaceae | S5 (2000) | K. Erickson (2016) |
| Sanicula crassicaulis | Pacific sanicle | herbs | Apiaceae | S4 (2015) | H. Roemer (2004); K. Erickson (2016); M. Fairbarns (2016); A. Simon (2017) |
| Sanicula graveolens | Sierra sanicle | herbs | Apiaceae | S3S4 (2001) | K. Erickson (2016); M. Fairbarns (2016) |
| Saxifraga cespitosa | tufted saxifrage | herbs | Saxifragaceae | S4 (2015) | M. Fairbarns (2016) |
| Scapania americana | mesic-humid conifer forest | mosses, liverworts & hornworts | Scapaniaceae | S5 (2015) | A. Simon (2017) |
| Scleropodium obtusifolium | mosses, liverworts & hornworts | Brachytheciaceae | S4S5 (2015) | S. Joya (2017); A. Simon (2017) | |
| Scleropodium touretii | mosses, liverworts & hornworts | Brachytheciaceae | S4 (2015) | T. McIntosh (2010); O. Lee (2017) | |
| Scoparia biplagialis | double-striped scoparia moth | butterflies & moths | Crambidae | unlisted | S. Gilmore (2017) |
| Sedum lanceolatum var. nesioticum | lance-leaved stonecrop | herbs | Crassulaceae | S3S4 (2001) | M. Fairbarns (2016); A. Simon (2017) |
| Sedum spathulifolium | broad-leaved stonecrop | herbs | Crassulaceae | S5 (2014) | K. Erickson (2016); M. Fairbarns (2016); A. Simon (2017) |
| Selaginella wallacei | Wallace's spikemoss | ferns & allies | Selaginellaceae | S5? (2015) | H. Roemer (2004); H. Janszen (2017); K. Erickson (2016); M. Fairbarns (2016); A. Simon (2017); A. J. Wright (2017) |
| Selatosomus suckleyi | beetles | Elateridae | SU (2017) | S. Gilmore (2017) | |
| Silene coronaria | rose campion | herbs | Caryophyllaceae | exotic | H. Roemer (2004); K. Erickson (2016); M. Fairbarns (2016); A. Simon (2017) |
| Silis lutea | beetles | Cantharidae | SU (2017) | S. Gilmore (2017) | |
| Sonchus oleraceus | common sow thistle | herbs | Asteraceae | exotic | K. Erickson (2016); M. Fairbarns (2016) |
| Sphaerocarpos texanus | Texas balloonwort | mosses, liverworts & hornworts | Sphaerocarpaceae | S2 (2015) | R. Batten (2013) |
| Sphaerophorus tuckermanii | fragmenting coral | lichens | Sphaerophoraceae | S5 (2010) | A. Simon (2017) |
| Sphaerophorus venerabilis | ancient coral | lichens | Sphaerophoraceae | S4 (2010) | A. Simon (2017) |
| Spiraea douglasii | pink spiraea | shrubs | Rosaceae | S5 (2000) | K. Erickson (2016) |
| Stachys cooleyae | Cooley’s hedge-nettle | herbs | Lamiaceae | S5 (2000) | K. Erickson (2016); M. Fairbarns (2016); A. Simon (2017) |
| Stellaria crispa | crisp starwort | herbs | Caryophyllaceae | S4S5 (2015) | A. Simon (2017) |
| Stellaria media | common chickweed | herbs | Caryophyllaceae | exotic | K. Erickson (2016); M. Fairbarns (2016); A. Simon (2017) |
| Sticta fuliginosa | peppered moon | lichens | Lobariaceae | S4 (2010) | C. Björk (2010); Simon (2017) |
| Sticta sylvatica | lichens | Lobariaceae | unlisted | A. Simon (2017) | |
| Strophosoma melanogrammum | beetles | Curculionidae | SNA (2017) | S. Gilmore (2017) | |
| Symphoricarpos albus | snowberry | shrubs | Caprifoliaceae | S3S4 (2001) | K. Erickson (2016) |
| Symphoricarpos mollis | creeping snowberry | shrubs | Caprifoliaceae | unlisted | A. Simon (2017) |
| Syntrichia laevipila | twisted oak moss | mosses, liverworts & hornworts | Pottiaceae | S3 (2015) | A. Simon (2017) |
| Syntrichia princeps | brown screw-moss | mosses, liverworts & hornworts | Pottiaceae | S4S5 (2015) | T. McIntosh (2010); O. Lee (2017); A. Simon (2017) |
| Syntrichia ruralis | star moss | mosses, liverworts & hornworts | Pottiaceae | S5 (2015) | T. McIntosh (2010); A. Simon (2017) |
| Tachycineta thalassina | violet-green swallow | birds | Hirundinidae | S4S5B (2015) | R. Zich (2016) |
| Taraxacum lacistophyllum | dandelion | herbs | Asteraceae | exotic | A. Simon (2017) |
| Taraxacum officinale | common dandelion | herbs | Asteraceae | exotic | K. Erickson (2016); M. Fairbarns (2016) |
| Thryomanes bewickii | Bewick’s wren | birds | Troglotydiae | S4 (2015) | R. Zich (2016) |
| Thuja plicata | western redcedar | trees | Cupressaceae | S5 (2015) | K. Erickson (2016); M. Fairbarns (2016); A. Simon (2017) |
| Thysanocarpus curvipes | sand fringepod | herbs | Brassicaceae | S3 (2015); N3 Vulnerable in Canada S3 (Blue-listed) | R. Batten (2013); A. Simon (2017) |
| Timmiella crassinervis | mosses, liverworts & hornworts | Pottiaceae | S3S4 (2015) | T. McIntosh (2010); A. Simon (2017) | |
| Torilis japonica | upright hedge-parsley | herbs | Apiaceae | exotic | M. Fairbarns (2016); A. Simon (2017) |
| Tortella sp. | mosses, liverworts & hornworts | Pottiaceae | — | T. McIntosh (2010); A. Simon (2017) | |
| Tortula muralis | mosses, liverworts & hornworts | Pottiaceae | S4? (2015) | T. McIntosh (2010) | |
| Toxicoscordion venenosum var. venenosum | meadow deathcamas | herbs | Melanthiaceae | S5 (2000) | H. Roemer (2004); K. Erickson (2016); M. Fairbarns (2016); R. Zich (2016); A. Simon (2017) |
| Trametes versicolor | turkey tail | fungi | Polyporaceae | unlisted | R. Zich (2016) |
| Trifolium dubium | little hop clover | herbs | Fabaceae | exotic | M. Fairbarns (2016) |
| Trifolium microcephalum | small-headed clover | herbs | Fabaceae | S4? (2015) | H. Roemer (2004); M. Fairbarns (2016); A. Simon (2017) |
| Trifolium microdon | thimble clover | herbs | Fabaceae | S3S4 (2015) | A. Simon (2017) |
| Trifolium oliganthum | few-flowered clover | herbs | Fabaceae | S4? (2015) | H. Roemer (2004); M. Fairbarns (2016); A. Simon (2017) |
| Trifolium willdenovii | tomcat clover | herbs | Fabaceae | S4? (2015) | H. Roemer (2004); M. Fairbarns (2016); A. Simon (2017) |
| Trisetum cernuum | nodding trisetum | grasses, sedges and rushes | Poaceae | S5 (2015) | M. Fairbarns (2016) |
| Triteleia hyacinthina | white brodiaea | herbs | Themidaceae | S4 (2015) | K. Erickson (2016); M. Fairbarns (2016); A. Simon (2017) |
| Troglodytes pacificus | Pacific wren | birds | Troglotydiae | S5B (2015) | R. Zich (2016) |
| Tsuga heterophylla | western hemlock | trees | Pinaceae | S5 (2015) | A. Simon (2017) |
| Tuckermannopsis chlorophylla | silver-lined wrinkle | lichens | Parmeliaceae | S5 (2010) | C. Björk (2010) * syn. U. filipendula reported |
| Turdus migratorius | American robin | birds | Turdidae | S5B (2015) | R. Zich (2016) |
| Turritis glabra | tower mustard | herbs | Brassicaceae | S5 (2015) | M. Fairbarns (2016) |
| Umbillicaria polyphylla | petalled rocktripe | lichens | Umbilicariaceae | S4 (2010) | C. Björk (2010) * syn. U. filipendula reported |
| Urtica dioica | stinging nettle | herbs | Urticaceae | exotic | K. Erickson (2016); M. Fairbarns (2016); A. Simon (2017) |
| Usnea cavernosa | pitted beard | lichens | Parmeliaceae | S2S3 (2010) | A. Simon (2017) |
| Usnea dasopoga | fish-net beard | lichens | Parmeliaceae | S4S5 (2010) | C. Björk (2010) * syn. U. filipendula reported |
| Usnea glabrata | lustrous beard | lichens | Parmeliaceae | S3 (2010) | A. Simon (2017) |
| Usnea intermedia | exploding beard | lichens | Parmeliaceae | S1S2 (2010) | C. Björk (2010) |
| Usnea subfloridana | nit beard | lichens | Parmeliaceae | S4 (2010) | C. Björk (2010) |
| Usnea substerilis | embossed beard | lichens | Parmeliaceae | S4S5 (2010) | C. Björk (2010) |
| Vaccinium parvifolium | red huckleberry | shrubs | Ericaceae | S5 (2015) | K. Erickson (2016) |
| Venusia sp. | — | butterflies & moths | Geometridae | unlisted | S. Gilmore (2017) |
| Verbascum thapsus | great mullein | herbs | Scrophulariaceae | exotic | K. Erickson (2016); M. Fairbarns (2016); A. Simon (2017) |
| Vermivora celata | orange-crowned warbler | birds | Parulidae | S5B (2015) | R. Zich (2016) |
| Veronica arvensis | corn speedwell | herbs | Plantaginaceae | exotic | H. Roemer (2004); M. Fairbarns (2016); A. Simon (2017) |
| Veronica serpyllifolia | thyme-leaved speedwell | herbs | Plantaginaceae | SNA (2000) | K. Erickson (2016) |
| Vicia americana | American vetch | herbs | Fabaceae | S5 (2015) | H. Roemer (2004) |
| Vicia hirsuta | hairy vetch | herbs | Fabaceae | exotic | H. Roemer (2004); M. Fairbarns (2016) |
| Vicia sativa | common vetch | herbs | Fabaceae | exotic | H. Roemer (2004); K. Erickson (2016); M. Fairbarns (2016); A. Simon (2017) |
| Vireo cassinii | Cassin’s vireo | birds | Vireonidae | S5B (2015) | R. Zich (2016) |
| Vireo huttoni | Hutton’s vireo | birds | Vireonidae | S4 (2015) | R. Zich (2016) |
| Vulpia bromoides | brome fescue | grasses, sedges and rushes | Poaceae | exotic | H. Roemer (2004); M. Fairbarns (2016); A. Simon (2017) |
| Waynea californica | — | lichens | Ramalinaceae | unlisted | C. Björk (2010) |
| Weissia controversa | green-tufted stubble moss | mosses, liverworts & hornworts | Pottiaceae | S4 (2015) | T. McIntosh (2010); A. Simon (2017) |
| Wilsonia pusilla | Wilson’s warbler | birds | Parulidae | S5B (2015) | R. Zich (2016) |
| Xanthoria parietina | maritime sunburst | lichens | Teloschistaceae | exotic | A. Simon (2017) |
| Yabea microcarpa | California hedge-parsley | herbs | Apiaceae | S4 (2015) | H. Roemer (2004); H. Janszen (2017); A. Simon (2017); A. Wright (2017) |
| Zonotrichia leucophrys | white-crowned sparrow | birds | Emberizidae | S5B (2011) | R. Zich (2016) |
| Zygodon viridissimus | green yoke-moss | mosses, liverworts & hornworts | Orthotrichaceae | S4? (2015) | T. McIntosh (2010) *Z. gracilis reported |