Vascular Plant Rankings 2007
| Scientific Name | Common Name | Heritage Global Rank | Heritage State Rank | Federal Status | State Status | Heritage list | Oregon County Distribution | Oregon Ecoregion | Other States |
| Abronia latifolia | Yellow sandverbena | G5 | S3 | 4 | Clat, Coos, Curr, Doug, Lane, Linc, Till | CR | CA, WA | ||
| Abronia turbinata | Trans montane abronia | G5 | S1 | 2 | Harn, Malh | BR | CA, ID, NV, AZ | ||
| Abronia umbellata ssp. breviflora | Pink sandverbena | G4G5T2 | S1 | SOC | LE | 1 | Clat, Coos, Curr, Doug, Lane, Linc, Till | CR | CA, WA, BC |
| Achnatherum hendersonii | Henderson ricegrass | G3 | S2 | SOC | C | 1 | Croo, Gran, Sher, Wasc | BM, CB | WA |
| Achnatherum speciosum | Desert needlegrass | G5 | S2 | 2 | Harn | BR | CA, NV + | ||
| Achnatherum wallowaensis | Wallowa ricegrass | G2G3 | S2S3 | SOC | 1 | Croo, Wall | BM | ||
| Achnatherum webberi | Webber needlegrass | G4 | S3 | 4 | Harn, Lake, Malh | BR | CA, ID, NV + | ||
| Adiantum jordanii | California maiden-hair | G4G5 | S2 | 2 | Coos, Curr, Doug, Jose | CR, KM | CA | ||
| Agastache cusickii | Cusick's giant-hyssop | G3G4 | S2 | 2 | Harn, Lake, Malh | BR | ID, MT, NV | ||
| Agoseris elata | Tall agoseris | G4 | S1 | 2 | Clac, Desc, Hood, Jeff, Wasc | EC, WC | CA,WA | ||
| Agrostis hendersonii | Henderson's bentgrass | G1Q | SH | SOC | 1-ex | Jack | KM | CA | |
| Agrostis howellii | Howell's bentgrass | G2 | S2 | SOC | C | 1 | Hood, Linn, Mult | WC, WV | |
| Aliciella triodon | Coyote gilia | G3G4 | SNR | 3 | Malh | BR | CA, NV + | ||
| Allenrolfea occidentalis | Iodine bush | G4 | S2 | 2 | Harn, Malh | BR | CA, ID, NV+ | ||
| Allium bisceptrum | Two-stemmed onion | G4G5 | S4 | 4 | Croo, Desc, Gran, Harn, Klam, Lake, Malh | BM, BR | CA, ID+ | ||
| Allium bolanderi var. bolanderi | Bolander onion | G4T3? | SNR | 3 | Curr, Jack?, Jose | KM | CA | ||
| Allium dictuon | Blue Mt. onion | G2 | S2 | SOC | 1 | Wall | BM | WA | |
| Allium douglasii var. nevii | Nevius' onion | G4G5T3T4 | S3? | 3 | Hood, Wasc | EC | WA | ||
| Allium geyeri var. geyeri | Geyer's onion | G4G5T4 | S1 | 2 | Wall | BM | ID, NV, WA+ | ||
| Allium peninsulare | Peninsular onion | G5 | SH | 2-ex | Jack | KM?, WC? | CA | ||
| Allium robinsonii | Robinson's onion | G3 | SH | SOC | 2-ex | Gill, Morr, Sher, Umat | CB | WA | |
| Allium sanbornii var. sanbornii | Sanborn's onion | G3T3 | SNR | 3 | Jack | KM | CA | ||
| Allium tolmiei var. platyphyllum | Flat-leaved Tolmie's onion | G4G5T3Q | S3? | 3 | Bake, Gran, Umat, Unio, Wall | BM | ID | ||
| Allium unifolium | One-leaved onion | G4G5 | S4 | 4 | Polk, Yamh | WV | CA | ||
| Ammannia robusta | An ammannia | G5 | SNR | 3 | Bent, Mult, Sher, Wasc | CB, WV | CA, ID, NV, WA + | ||
| Amsinckia carinata | Malheur Valley fiddleneck | G2 | S2 | SOC | LT | 1 | Malh | SP | |
| Androsace elongata ssp. acuta | Long-stemmed androsace | G5?T3T4 | SH | 2-ex | Jack | KM | CA | ||
| Anemone multifida var. tetonensis | Cliff anemone | G5T4T5 | SNR | 3 | Unio, Wall | BM | ID, NV+ | ||
| Anemone oregana var. felix | Bog anemone | G4T2 | S1 | SOC | 2 | Linc, Linn, Polk, Till, Yamh | CR, WC | WA | |
| Antennaria aromatica | Aromatic antennaria | G4 | S3 | 4 | Wall | BM | MT, WY | ||
| Antirrhinum kingii | King snapdragon | G4 | SNR | 3 | Harn, Malh | BR | CA, NV+ | ||
| Antirrhinum vexillo-calyculatum ssp. breweri | Brewer's snapdragon | G4G5 | SNR | 3 | Doug, Jack, Jose | KM, WC | CA | ||
| Arabis davidsonii | Davidson's rockcress | G4G5Q | SNR | 3 | Bake, Wall | BM | CA+ | ||
| Arabis furcata | Cascade rockcress | G4 | S3 | 4 | Clac?, Hood, Jeff, Mari?, Wasc | EC, WC | WA | ||
| Arabis hastatula | Hells Canyon rockcress | G2 | S2 | SOC | 1 | Linn, Wall | BM, WC | ||
| Arabis koehleri var. koehleri | Koehler's rockcress | G3T1 | S1 | SOC | C | 1 | Doug | KM | |
| Arabis koehleri var. stipitata | Koehler's stipitate rockcress | G3T3 | S3 | 4 | Curr, Jack, Jose | KM | CA | ||
| Arabis macdonaldiana | Red Mountain rockcress | G2 | S1 | LE | LE | 1 | Curr, Jose | KM | CA |
| Arabis modesta | Rogue Canyon rockcress | G3Q | S2 | SOC | 2 | Jack, Jose | KM | CA | |
| Arabis sparsiflora var. atrorubens | Sickle-pod rockcress | G5T3 | S2 | 2 | Hood, Mult, Wasc | EC, WC | WA | ||
| Arabis suffrutescens var. horizontalis | Crater Lake rockcress | G5T1 | S1 | SOC | C | 1 | Jack?, Klam | WC | |
| Arctostaphylos hispidula | Gasquet manzanita | G3 | S2 | SOC | 2 | Curr, Doug, Jose | CR, KM | CA | |
| Argemone munita | Prickly-poppy | G4 | S2 | 2 | Harn, Malh | BR | NV | ||
| Arnica viscosa | Shasta arnica | G4 | S2 | 2 | Desc, Doug, Klam | WC | CA | ||
| Artemisia arbuscula ssp. longicaulis | Lahontan sagebrush | G5T3T5 | S1 | 2 | Croo, Harn, Jeff?, Klam, Lake, Malh | BM?, BR, EC | CA, NV | ||
| Artemisia campestris var. wormskioldii | Northern wormwood | G5T1 | SX | C | LE | 1-ex | Mult, Sher, Umat, Wasc | CB, WC | WA |
| Artemisia ludoviciana ssp. estesii | Estes' artemisia | G5T3 | S3 | SOC | 4 | Croo, Desc, Jeff | BM, EC | ||
| Artemisia packardiae | Packard's artemisia | G3 | S3 | 4 | Malh | BR | ID, NV | ||
| Artemisia papposa | Owyhee sagebrush | G4 | S2 | 2 | Malh | BR | ID, NV | ||
| Artemisia pycnocephala | Coastal sagewort | G4G5 | S1 | 2 | Coos, Curr | CR | CA | ||
| Asarum wagneri | Green-flowered wild-ginger | G3 | S3 | C | 4 | Doug, Jack, Klam, Lane | EC, WC | ||
| Asplenium septentrionale | Grass-fern | G4G5 | S1 | 2 | Doug, Jack, Klam | WC | CA | ||
| Asplenium trichomanes-ramosum | Green spleenwort | G4 | S1 | 2 | Bake, Wall | BM | CA, ID, NV, WA+ | ||
| Astragalus alvordensis | Alvord milk-vetch | G4 | S4 | 4 | Harn, Malh | BR | NV | ||
| Astragalus applegatei | Applegate's milk-vetch | G1 | S1 | LE | LE | 1 | Klam | EC | |
| Astragalus atratus var. owyheensis | Owyhee milk-vetch | G4G5T3 | S3 | 4 | Bake, Malh | BM, SP | ID, NV | ||
| Astragalus californicus | California milk-vetch | G3 | S1 | 2 | Jack | KM | CA | ||
| Astragalus calycosus | King's rattleweed | G5 | S1 | 2 | Malh | BR | CA, ID, NV+ | ||
| Astragalus collinus var. laurentii | Laurence's milk-vetch | G5T1 | S1 | SOC | LT | 1 | Gill, Morr, Sher, Umat | CB | |
| Astragalus conjunctus var. rickardii | Rickard's milk-vetch | G4T3 | SNR | 3 | Wasc | CB | WA | ||
| Astragalus cusickii var. sterilis | Sterile milk-vetch | G5T2 | S2 | LT | 1 | Malh | BR | ID | |
| Astragalus diaphanus var. diurnus | South John Day milk-vetch | G3G4T2Q | S2 | LT | 1 | Gran | BM | ||
| Astragalus gambelianus | Gambel milk-vetch | G5 | S1 | 2 | Jack | KM | CA | ||
| Astragalus geyeri var. geyeri | Geyer's milk-vetch | G4T4 | S2? | 2 | Harn, Malh, Umat | BR, CB | CA, ID, NV, WA + | ||
| Astragalus hoodianus | Hood River milk-vetch | G4 | S3 | 2 | Hood, Wasc | CB, EC | WA | ||
| Astragalus lemmonii | Lemmon's milk-vetch | G3? | SH | 1-ex | Croo, Desc, Gran, Klam | EC | CA, NV | ||
| Astragalus misellus var. misellus | Pauper milk-vetch | G4T3T4 | SNR | 3 | Croo, Gran, Harn, Jeff, Whee | BM, BR | |||
| Astragalus mulfordiae | Mulford's milk-vetch | G2 | S1 | SOC | LE | 1 | Malh | BR, SP | ID |
| Astragalus peckii | Peck's milk-vetch | G3 | S3 | LT | 1 | Desc, Klam | BM, EC, WC | ||
| Astragalus platytropis | Broad-keeled milk-vetch | G5 | S1 | 2 | Malh | BR | CA, ID, NV, UT | ||
| Astragalus reventiformis | Long-leaved milk-vetch | G5 | SNR | 3 | Sher | CB | WA | ||
| Astragalus robbinsii var. alpiniformis | Wallowa milk-vetch | G5T3 | S3 | 4 | Wall | BM | |||
| Astragalus sclerocarpus | Stalked-pod milk-vetch | G5 | SNR | 3 | Gill, Morr, Sher?, Umat, Wasc | CB | WA, BC | ||
| Astragalus succumbens | Columbia milk-vetch | G4G5 | S4 | 4 | Gill, Morr, Umat, Wasc | CB | WA | ||
| Astragalus tegetarioides | Bastard kentrophyta | G3 | S3 | SOC | C | 1 | Croo, Harn | BM, BR | CA |
| Astragalus tyghensis | Tygh Valley milk-vetch | G2 | S2 | LT | 1 | Wasc | CB | ||
| Astragalus umbraticus | Woodland milk-vetch | G4 | S3 | 4 | Curr, Doug, Jose, Lane | CR, KM, WC | CA | ||
| Atriplex gmelinii var. gmelinii | Gmelin's saltbush | G5TNR | S1 | 2 | Lane, Linc, Till | CR, EC | CA, WA, AK | ||
| Atriplex leucophylla | Beach saltbush | G4G5 | SNR | 3 | Coos, Linc | CR | CA + | ||
| Atriplex powellii | Powell's saltbush | G4 | SNR | 3 | Malh | BR | AZ + | ||
| Baccharis douglasii | Marsh baccharis | G5 | S1? | 2 | Curr | CR | CA | ||
| Balsamorhiza hookeri var. idahoensis | Hooker's balsamroot | G5T3? | SNR | 3 | Bake | BM | ID | ||
| Balsamorhiza hookeri var. lanata | Woolly balsamroot | G5T2Q | S1 | 1 | Jack | KM | CA | ||
| Balsamorhiza rosea | Rosy balsamroot | G4G5 | S1 | 2 | Umat | CB | WA | ||
| Balsamorhiza sericea | Silky balsamroot | G4Q | S3 | 4 | Jose | KM | CA | ||
| Bensoniella oregana | Bensonia | G3 | S3 | SOC | C | 1 | Coos, Curr, Doug, Jose | CR, KM | CA |
| Bergia texana | Texas bergia | G5 | S3? | 4 | Colu?, Malh, Mult | BR, WV | CA, NV, WA + | ||
| Bolandra oregana | Oregon bolandra | G3 | S3 | C | 4 | Bake, Clac, Hood, Mult, Umat, Unio, Wall | BM, WC, WV | ID, WA | |
| Botrychium ascendens | Upward-lobed moonwort | G2G3 | S2 | SOC | C | 1 | Bake, Gran, Wall, Whee | BM | CA ID, NV, WA + |
| Botrychium campestre | Prairie moonwort | G3G4 | S1 | SOC | 2 | Wall | BM | AB, SK, ND + | |
| Botrychium crenulatum | Crenulate grape-fern | G3 | S2 | SOC | C | 1 | Bake, Croo, Gran, Harn, Lake, Unio, Wall, Whee | BM, BR, KM, WC? | AZ, CA, ID, MT, NV, UT, WA, WY |
| Botrychium hesperium | Western moonwort | G3G4 | SNR | 3 | Umat, Unio, Wall | BM | WA + | ||
| Botrychium lanceolatum | Lance-leaved grape-fern | G5 | S3 | 4 | Bake, Gran, Harn, Hood, Klam, Umat, Unio, Wall | BM, BR, WC | WA, ID + | ||
| Botrychium lineare | Skinny moonwort | G1 | S1 | C | 1 | Wall | BM | CA, CO, ID, MT, NB, QC | |
| Botrychium lunaria | Moonwort | G5 | S2 | 2 | Gran?, Harn, Unio, Wall | BM, BR | NV, WA + | ||
| Botrychium minganense | Gray moonwort | G4 | S3 | 4 | Bake, Croo, Doug, Gran, Harn, Hood, Linn, Morr, Umat, Unio, Wall, Wasc, Whee | BM, BR, EC, WC | CA, ID, WA + | ||
| Botrychium montanum | Mountain grape-fern | G3 | S2 | SOC | 2 | Bake, Croo, Gran, Hood, Linn, Mari, Unio, Wall, Wasc, Whee | BM, EC, WC | CA, MT, WA, BC + | |
| Botrychium paradoxum | Twin-spike moonwort | G2 | S1 | SOC | C | 1 | Bake, Gran, Unio, Wall, Whee | BM | MT, UT, WA, AB, BC, SK |
| Botrychium pedunculosum | Stalked moonwort | G2G3 | S1 | SOC | C | 1 | Bake, Gran, Unio, Wall | BM | MT, WA, AB, BC, SK |
| Botrychium pinnatum | Pinnate grape-fern | G4? | S3 | 4 | Bake, Gran, Harn, Umat, Unio, Wall, Wasc, Whee | BM, BR, EC | CA, WA, ID + | ||
| Botrychium pumicola | Pumice grape-fern | G3 | S3 | LT | 1 | Desc, Klam, Lake | EC, WC | CA | |
| Brodiaea californica | California brodiaea | G4? | SNR | 3 | Jack | KM | CA | ||
| Brodiaea terrestris | Dwarf brodiaea | G4G5 | S2 | 2 | Coos, Curr | CR | CA | ||
| Bulbostylis capillaris | Densetuft hairsedge | G5 | SH | 2-ex | Jose | KM | CA + | ||
| Bupleurum americanum | Bupleurum | G5 | S1 | 2 | Bake, Wall | BM | ID + | ||
| Calamagrostis breweri | Brewer reedgrass | G3 | S2 | 2 | Clac, Hood, Jeff, Linn, Mari | WC | CA | ||
| Callitriche fassettii | The Dalles water-starwort | GHQ | S1 | 1 | Malh, Wasc | BR, CB?, EC? | |||
| Callitriche hermaphroditica | Northern water-starwort | G5 | SNR | 3 | Bent, Desc, Doug, Harn, Jack, Jeff, Klam, Lake, Lane, Malh, Wasc | BM, BR, CB, CR, EC, KM, WV | CA, ID, WA + | ||
| Callitriche marginata | Winged water-starwort | G4 | S2 | 2 | Jack, Jose, Wasc | CB, KM | BC, CA | ||
| Calochortus coxii | Cox's mariposa-lily | G1 | S1 | SOC | LE | 1 | Doug | KM | |
| Calochortus greenei | Greene's mariposa-lily | G3 | S3 | SOC | C | 1 | Jack, Klam | EC, KM | CA |
| Calochortus howellii | Howell's mariposa-lily | G3 | S3 | SOC | LT | 1 | Curr, Jose | KM | |
| Calochortus indecorus | Sexton Mt. mariposa-lily | GX | SX | LE | 1-X | Jose | KM | ||
| Calochortus longebarbatus var. longebarbatus | Long-bearded mariposa-lily | G4T4 | S3 | 4 | Klam, Lake, Umat, Unio, Wasc | BM, EC | CA, WA | ||
| Calochortus longebarbatus var. peckii | Peck's mariposa-lily | G4T3 | S3 | SOC | C | 1 | Croo, Gran, Harn, Whee | BM | |
| Calochortus macrocarpus var. maculosus | Green-band mariposa-lily | G5T2 | S2 | SOC | 1 | Wall | BM | ID, WA | |
| Calochortus monophyllus | One-leaved calochortus | G3G4 | S1 | 2 | Jack, Klam | EC, WC | CA | ||
| Calochortus nitidus | Broad-fruit mariposa-lily | G3 | S1 | SOC | 2 | Jack, Wall | BM, KM | ID | |
| Calochortus nudus | Shasta star-tulip | G3G4 | S2 | 2 | Jack | KM | CA | ||
| Calochortus persistens | Siskiyou mariposa lily | G1 | S1 | C | 1 | Jack | KM | CA | |
| Calochortus umpquaensis | Umpqua mariposa-lily | G1 | S1 | SOC | LE | 1 | Doug, Jack, Jose | KM, WC | |
| Calyptridium roseum | Rosy pussypaws | G5 | S1 | 2 | Harn, Lake, Malh | BM, BR | CA, ID, WA + | ||
| Camassia howellii | Howell's camassia | G2 | S2 | SOC | C | 1 | Jack, Jose | KM | |
| Camissonia boothii ssp. boothii | Booth evening-primrose | G5T4 | SNR | 4 | Bake, Malh, Wall? | BM, BR | CA, ID, NV, WA, AZ | ||
| Camissonia graciliflora | Slender-flowered evening-primrose | G4 | S2 | 2 | Jack, Jose | KM | CA | ||
| Camissonia ovata | Golden eggs | G3G4 | SNR | 3 | Doug, Jose | KM | CA | ||
| Camissonia palmeri | Palmer's evening-primrose | G3G4 | SNR | 3 | Malh | SP | CA, ID, NV | ||
| Camissonia parvula | Lewis' River suncup | G5 | SNR | 3 | Harn?, Lake, Malh | BR | CA, ID, NV, WA + | ||
| Camissonia pusilla | Washoe suncup | G3G4 | SNR | 3 | Malh | BR | CA, ID, NV, UT | ||
| Camissonia pygmaea | Dwarf evening-primrose | G3 | S1 | SOC | C | 1 | Gill, Gran, Harn, Umat?, Wasc, Whee | BM, BR, CB | WA |
| Cardamine nuttallii var. covilleana | Coville's toothwort | G5T3? | SNR | 3 | Jose | KM | CA | ||
| Cardamine nuttallii var. dissecta | Dissected toothwort | G5T4T5 | SNR | 3 | Coos, Jack, Jose, Klam | CR, KM, WC | CA, WA | ||
| Cardamine nuttallii var. gemmata | Purple toothwort | G5T3 | S3 | C | 4 | Curr, Jose | KM | CA | |
| Cardamine pattersonii | Saddle Mt. bittercress | G2 | S2 | SOC | C | 1 | Clat, Till | CR | |
| Carex abrupta | Abrupt-beaked sedge | G5 | S1 | 2 | Harn, Klam, Linn?, Wall | BM, BR, WC | CA, ID, NV + | ||
| Carex atherodes | Awned sedge | G5 | S2? | 3 | Harn, Klam, Lake | BR, EC | CA, ID, NV, WA + | ||
| Carex atrosquama | Blackened sedge | G4? | S1 | 2 | Harn, Wall | BM, BR | ID, WA + | ||
| Carex barbarae | Santa Barbara sedge | G4G5Q | S3? | 4 | Curr, Doug, Jack, Jose | CR, KM | CA | ||
| Carex bebbii | Bebb's sedge | G5 | S4 | 4 | Bake, Desc, Unio, Wall | BM | WA + | ||
| Carex brevicaulis | Short-stemmed sedge | G5 | S2 | 2 | Clat, Coos, Curr, Doug, Linc, Till | CR | WA, CA | ||
| Carex brunnescens ssp. brunnescens | Brownish sedge | G5T5 | S1? | 3 | Clac? | WC? | WA + | ||
| Carex capillaris | Capillary sedge | G5 | S2 | 2 | Harn, Wall | BM, BR | ID, NV + | ||
| Carex capitata | Capitate sedge | G5 | S2 | 2 | Desc, Harn, Jack, Klam, Lake | BR, EC, WC | ID, NV, WA + | ||
| Carex comosa | Bristly sedge | G5 | S1 | 2 | Colu?, Jose, Klam, Mult | KM, WV | CA, ID, WA + | ||
| Carex concinna | Low northern sedge | G4G5 | S3 | 2 | Gran, Wall | BM | ID, WA + | ||
| Carex constanceana | Constance's sedge | G1 | S1 | 1 | Lake | EC | WA | ||
| Carex cordillerana | Cordilleran sedge | GNR | S2 | 2 | Bake, Harn, Morr, Umat, Unio, Wall | BM, BR | AB | ||
| Carex crawfordii | Crawford's sedge | G5 | S1 | 2 | Jack | WC | ID, WA + | ||
| Carex diandra | Lesser panicled sedge | G5 | S1 | 2 | Lake, Lane | EC, WC | CA, NV, WA + | ||
| Carex dioica var. gynocrates | Yellow bog sedge | G5 | S1 | 2 | Wall | BM | NV + | ||
| Carex eleocharis | Involute-leaved sedge | G5 | SH | 2-ex | Bake, Klam | BM, EC | CA, ID, NV, WA + | ||
| Carex epapillosa | Sedge | GNR | SNR | 3 | Doug, Gran, Harn, Klam, Wall | BM, BR, WC | CA, ID, NV, WA + | ||
| Carex gynodynama | Hairy sedge | G4G5 | S2 | 2 | Coos, Curr, Doug, Lane | CR, KM, WV | CA | ||
| Carex haydeniana | Hayden's sedge | G4G5 | S4 | 4 | Bake, Gran, Harn, Wall | BM, BR | CA, ID, NV, WA + | ||
| Carex hystericina | Porcupine sedge | G5 | S3 | 4 | Bake, Croo, Desc, Gill, Gran, Jeff, Malh, Wall, Wasc, Whee | BM, BR, CB, SP | CA, ID, WA + | ||
| Carex idahoa | Idaho sedge | G2 | S1 | SOC | 1 | Gran | BM | ID, CA + | |
| Carex infirminervia | A sedge | G5 | SNR | 3 | Wall | BM | CA, ID, NV, WA + | ||
| Carex klamathensis | A sedge (SW OR pops. of Carex livida) | G2 | S2 | 1 | Jose | KM | CA | ||
| Carex lasiocarpa var. americana | Slender sedge | G5T5 | S2 | 2 | Desc, Klam, Lake, Wall, Wasc | BM, EC, WC | CA, ID, WA + | ||
| Carex leptalea ssp. leptalea | Flaccid sedge | G5T5 | S3 | 4 | Clac, Clat, Coos, Curr, Hood, Jack, Klam, Lane, Linc, Linn, Mult, Unio, Wall, Wasc | BM, CR, KM, WC | CA, ID, WA + | ||
| Carex livida | Pale sedge | G5 | S2 | 2 | Clac, Lane, Linc, Mult | CR, WC | CA, ID, WA + | ||
| Carex macrocephala | Bighead sedge | G5 | S3 | 4 | Clat, Coos, Doug, Lane, Linc, Till | CR | WA, AK, BC | ||
| Carex macrochaeta | Alaska long-awned sedge | G5 | S2 | 2 | Clat, Mult | CR, WC | WA + | ||
| Carex media | Intermediate sedge | G5 | S1 | 2 | Wall | BM | WA + | ||
| Carex nardina | Spikenard sedge | G4G5 | S2? | 2 | Doug, Gran, Wall | BM, WC | ID, NV, WA + | ||
| Carex nervina | Sierra nerved sedge | G5 | S1 | 2 | Jack, Jose | KM | CA, NV | ||
| Carex pelocarpa | A sedge | G4G5 | S1 | 2 | Harn, Wall | BM, BR | ID, NV + | ||
| Carex pluriflora | Many flowered sedge | G4 | S1 | 2 | Clat | CR | WA, BC + | ||
| Carex praeceptorum | Teacher's sedge | G4G5 | S3 | 4 | Bake, Gran, Harn, Unio, Wall | BM, BR | CA, ID, NV, WA + | ||
| Carex pyrenaica ssp. micropoda | A sedge | G4G5T4T5 | S1 | 2 | Bake?, Unio?, Wall | BM | CA, ID, NV, WA + | ||
| Carex retrorsa | Retrorse sedge | G5 | S1 | 2 | Bake, Colu, Lane, Mult, Umat | BM, CB, WV | ID, WA + | ||
| Carex saxatilis | Russet sedge | G5 | S1 | 2 | Lake, Wall | BM, BR | ID, NV, WA + | ||
| Carex scabriuscula | Siskiyou sedge | G3G4 | S3 | 2 | Curr, Jack, Jose | KM | CA | ||
| Carex scirpoidea var. stenochlaena | Alaskan single-spiked sedge | G5T4T5 | S1? | 2 | Harn, Lane | BR, WC | ID, WA, MT + | ||
| Carex serratodens | Saw-tooth sedge | G5 | S2 | 2 | Doug, Jack, Jose | KM | CA | ||
| Carex subnigricans | Dark alpine sedge | G5 | S1 | 2 | Harn, Wall | BM, BR | CA, NV, ID + | ||
| Carex tahoensis | Tahoe sedge | G5 | SNR | 3 | Gran, Wall | BM | CA, ID, WA + | ||
| Carex vernacula | Native sedge | G5 | S2 | 2 | Bake, Harn, Hood, Lake, Wall | BM, BR, EC, WC | CA, ID, NV, WA + | ||
| Castilleja brevilobata | Short-lobed red-paintbrush | G3 | S3 | 4 | Curr, Jack, Jose | KM | CA | ||
| Castilleja chambersii | Chambers' paintbrush | G1 | S1 | SOC | 1 | Clat | CR | ||
| Castilleja chlorotica | Green-tinged paintbrush | G3 | S3 | 1 | Croo, Desc, Klam, Lake | BM, EC | |||
| Castilleja flava var. rustica | Rustic paintbrush | G4G5T3T4 | S1? | 2 | Bake, Wall | BM | ID, MT | ||
| Castilleja fraterna | Fraternal paintbrush | G2 | S2 | SOC | 1 | Unio, Wall | BM | ||
| Castilleja levisecta | Golden paintbrush | G1 | SH | LT | LE | 1-ex | Linn, Mari, Mult | WV | WA, BC |
| Castilleja mendocinensis | Mendocino coast paintbrush | G2 | S1 | SOC | 1 | Curr | CR | CA | |
| Castilleja rubida | Purple alpine paintbrush | G2 | S2 | SOC | 1 | Wall | BM | ||
| Castilleja rupicola | Cliff paintbrush | G3 | S3 | SOC | 4 | Clac?, Desc, Doug, Hood?, Lane, Linn, Mari, Mult | WC | WA, BC | |
| Castilleja schizotricha | Split-hair paintbrush | G3 | S2 | 2 | Jack, Jose | KM | CA | ||
| Castilleja thompsonii | Thompson's paintbrush | G4 | S1 | 2 | Wasc | EC, WC | WA, BC | ||
| Castilleja viscidula | Sticky paintbrush | G4G5 | SNR | 3 | Bake, Harn, Unio, Wall | BM | ID, NV | ||
| Castilleja wightii | Wight's paintbrush | G2G3Q | SH | 3 | Curr | CR | CA | ||
| Caulanthus crassicaulis var. crassicaulis | Thick-stemmed wild cabbage | G4G5 | S4 | 4 | Harn, Lake, Malh | BR | NV | ||
| Caulanthus crassicaulis var. glaber | Smooth wild cabbage | G4G5T2T4 | S1 | 2 | Malh | BR | CA, NV, UT | ||
| Caulanthus major var. nevadensis | Slender wild cabbage | G4T3? | S1 | SOC | C | 2 | Harn, Malh | BR | CA, NV |
| Caulanthus pilosus | Hairy wild cabbage | G4 | S4 | 4 | Bake, Harn, Malh | BM, BR, SP | CA, ID, NV | ||
| Ceratophyllum echinatum | Prickly hornwort | G4? | SH | 2-ex | Lane | CR | WA + | ||
| Chaenactis cusickii | Cusick's chaenactis | G3 | S3 | 4 | Malh | BR | ID | ||
| Chaenactis macrantha | Large-flowered chaenactis | G4 | S3 | 4 | Harn, Malh | BR | CA, ID, NV + | ||
| Chaenactis nevii | Nevius' chaenactis | G4 | S4 | 4 | Gill, Gran, Jeff, Wasc, Whee | BM | |||
| Chaenactis xantiana | Desert pincusion | G4G5 | S1? | 2 | Harn, Lake, Malh | BR | CA, NV, AZ | ||
| Chaetadelpha wheeleri | Wheeler's skeleton-weed | G4 | S2 | 2 | Harn, Malh | BR | CA, NV | ||
| Cheilanthes covillei | Coville's lipfern | G4? | S1 | 2 | Jack | WC | CA, NV + | ||
| Cheilanthes feei | Fee's lipfern | G5 | S2 | 2 | Wall | BM | CA, ID, NV, WA + | ||
| Cheilanthes intertexta | Coastal lipfern | G5 | S1 | 2 | Doug, Jack | KM | CA | ||
| Chlorogalum angustifolium | Narrow-leaved amole | G4G5 | S1 | 2 | Jack, Jose | KM | CA | ||
| Cicendia quadrangularis | Timwort | G4 | S2 | 2 | Coos, Doug, Lane, Linn | CB, KM, WV | CA + | ||
| Cicuta bulbifera | Bulb-bearing water-hemlock | G5 | SH | 2-ex | Klam | EC | ID, WA + | ||
| Cimicifuga elata var. alpestris | Mountain tall bugbane | G3TNR | SNR | C | 3 | Doug, Jack, Jose | KM | ||
| Cimicifuga elata var. elata | Tall bugbane | G3 | S3 | C | 1 | Bent, Clac, Colu, Doug, Jack, Jose, Lane, Linn, Mari, Mult, Polk, Wash, Yamh | CR, KM, WC, WV | WA, BC | |
| Cirsium ciliolatum | Ashland thistle | G3 | S3 | 4 | Jack | KM | CA | ||
| Clarkia heterandra | Small-fruit clarkia | G4? | S3 | 4 | Doug, Jack, Jose | KM | CA | ||
| Claytonia nevadensis | Sierra spring-beauty | G4 | S3 | 4 | Harn | BR | CA, NV | ||
| Clintonia andrewsiana | Andrew's bead-lily | G4 | SH | 2-ex | Curr | CR | CA | ||
| Cochlearia officinalis | Spoonwort | G5 | S1 | 2 | Coos, Curr | CR | CA, WA + | ||
| Collomia larsenii | Talus collomia | G4 | S4 | 4 | Clac, Desc, Hood, Jeff, Lane | WC | CA, WA | ||
| Collomia mazama | Mt. Mazama collomia | G3 | S3 | 1 | Doug, Jack, Klam | WC | |||
| Collomia renacta | Barren Valley collomia | G1Q | S1 | SOC | C | 1 | Malh | BR | NV |
| Coptis trifolia | Three-leaf goldthread | G5 | S1 | 2 | Clac, Wasc | WC | BC + | ||
| Corallorhiza wisteriana | Spring coral-root | G5 | SNR | 3 | Jack | KM | ID + | ||
| Cordylanthus maritimus ssp. palustris | Pt. Reyes bird's-beak | G4?T2 | S2 | SOC | LE | 1 | Coos, Linc, Till | CR | CA |
| Corydalis aquae-gelidae | Cold-water corydalis | G5T3 | S3 | SOC | C | 1 | Clac, Lane, Linn, Mari, Mult | WC | WA |
| Coryphantha vivipara var. vivipara | Cushion coryphantha | G5T4 | S1 | 2 | Jeff, Sher | BM, BR?, CB | CA, ID, NV + | ||
| Crassula solierii | Solieri's pygmyweed | G4G5 | S1? | 3 | Lake | BR | CA, NV + | ||
| Cryptantha humilis | Low cryptantha | G4? | SNR | 3 | Harn, Malh, Wall | BM, BR | CA, ID, NV + | ||
| Cryptantha leiocarpa | Seaside cryptantha | G3G4 | S1 | 2 | Curr | CR | CA | ||
| Cryptantha leucophaea | Gray cryptantha | G2G3 | SH | 2-ex | Gill | CB | WA | ||
| Cryptantha milo-bakeri | Milo Baker's cryptantha | G3G4 | S1 | 2 | Curr, Jack, Jose | CR, KM | CA | ||
| Cryptantha propria | Malheur cryptantha | G4 | S4 | 4 | Bake, Gran, Harn, Lake, Malh, Whee | BM, BR, SP | ID | ||
| Cryptantha simulans | Pine woods cryptantha | G4 | SNR | 3 | Bake, Harn, Jack, Klam, Lake | BM, BR, EC, KM? | CA, ID, NV, WA | ||
| Cryptantha thompsonii | Thompson's cryptantha | G2G3 | SNR | 3 | Bake | BM | WA | ||
| Cryptogramma stelleri | Steller's rock-brake | G5 | S1 | 2 | Bake?, Wall | BM | NV, WA + | ||
| Cupressus bakeri | Baker's cypress | G3 | S1 | SOC | 2 | Jack, Jose | KM, WC | CA | |
| Cymopterus acaulis var. greeleyorum | Greeley's cymopterus | G5T2 | S1 | SOC | 1 | Malh | BR | ID | |
| Cymopterus longipes var. ibapensis | Ibapah wavewing | G4 | S2? | 2 | Malh | BR | ID, NV + | ||
| Cymopterus nivalis | Snowline cymopterus | G5 | S2 | 2 | Gran, Harn, Lake | BM, BR | ID, NV + | ||
| Cymopterus purpurascens | Purple cymopterus | G4 | S2 | 2 | Harn | BR | CA, ID, NV | ||
| Cyperus acuminatus | Short-pointed cyperus | G5 | S1 | 2 | Jack, Jose, Linn, Mari | KM, WV | CA, WA + | ||
| Cyperus bipartitus | Shining cyperus | G5 | SNR | 3 | Curr, Doug, Jack, Jose, Lane, Malh, Umat, Wasc | BR, CB, CR, KM, SP, WV | CA, ID, WA + | ||
| Cyperus lupulinus ssp. lupulinus | A cyperus | G5T5? | S1 | 2 | Wall | BM, WV | ID, WA + | ||
| Cypripedium californicum | California lady's-slipper | G3 | S3 | 4 | Coos, Curr, Doug, Jack, Jose | CR, KM | CA | ||
| Cypripedium fasciculatum | Clustered lady's-slipper | G4 | S3 | SOC | C | 2 | Bake, Curr, Doug, Jack, Jose | BM, KM, WC | CA, CO, ID, MT, WA, WY |
| Cypripedium montanum | Mountain lady's-slipper | G4 | S3S4 | 4 | Bake, Bent, Clac, Croo, Desc?, Doug, Gran, Hood, Jack, Jeff, Jose, Klam, Lake, Lane, Mari, Morr?, Mult, Umat, Unio, Wall, Wasc, Whee | BM, EC, KM, WC, WV | CA, ID, WA + | ||
| Darlingtonia californica | California pitcher-plant | G3G4 | S3S4 | 4 | Coos, Curr, Doug, Jose, Lane, Linc, Till | CR, KM | CA | ||
| Delphinium bicolor | Flathead larkspur | G4G5 | S1 | 2 | Malh | BR | ID, WA + | ||
| Delphinium leucophaeum | White rock larkspur | G4T2 | S2 | SOC | LE | 1 | Clac, Mari, Mult, Wash, Yamh | WV | WA |
| Delphinium nudicaule | Red larkspur | G4 | S2 | 2 | Doug, Jack, Jose | KM | CA | ||
| Delphinium nuttallii | Nuttall's larkspur | G4 | S1 | 2 | Clac, Hood, Mult, Wasc, Yamh | EC, WC, WV | WA, BC | ||
| Delphinium oreganum | Willamette Valley larkspur | G1Q | S1 | SOC | C | 1 | Clat, Lane, Linn, Mari, Polk, Yamh | CR, WC, WV | |
| Delphinium pavonaceum | Peacock larkspur | G1Q | S1 | SOC | LE | 1 | Bent, Clac, Lane, Mari, Mult, Polk | CR?, WC?, WV | |
| Dicentra formosa ssp. oregana | Oregon bleedingheart | G5T4 | S4 | 4 | Curr, Jose | KM | CA | ||
| Dicentra pauciflora | Few-flowered bleedingheart | G3? | S1 | SOC | 2 | Jose | KM | CA | |
| Dichelostemma ida-maia | Firecracker flower | G4 | S4 | 4 | Curr, Doug, Jack, Jose | CR, KM, WC | CA | ||
| Dodecatheon austrofrigidum | Frigid shootingstar | G2 | S2 | SOC | 1 | Clat, Till | CR | WA | |
| Dodecatheon pulchellum var. shoshonense | Darkthroat shootingstar | G5TNR | S2 | 2 | Malh | BR | CA, ID, NV, UT | ||
| Douglasia laevigata | Smooth-leaved douglasia | G3 | SNR | 3 | Clac, Clat, Desc, Hood, Linn, Mari, Mult, Till | CR, WC | WA + | ||
| Draba aureola | Golden alpine draba | G4 | S4 | 4 | Clac, Desc, Klam, Lane | WC | CA, WA | ||
| Draba cusickii var. cusickii | Cusick's draba | G4T3 | S3 | 4 | Harn | BR | |||
| Draba howellii | Howell's whitlow-grass | G4 | S2 | C | 2 | Curr, Jose | KM | CA | |
| Draba lemmonii var. cyclomorpha | Wallowa draba | G4T3 | S3 | 4 | Unio, Wall | BM | |||
| Dryas drummondii | Yellow mountain-avens | G5 | S4 | 4 | Wall | BM | WA + | ||
| Dryopteris filix-mas | Male fern | G5 | S3 | 4 | Bake, Colu, Malh, Umat, Unio, Wall, Wasc | BM, BR, CR, EC, WC | CA, WA, ID + | ||
| Eatonella nivea | White eatonella | G4G5 | S3 | 4 | Harn, Lake, Malh | BR, SP | CA, ID, NV, WA | ||
| Elatine brachysperma | Short-seeded waterwort | G5 | S1 | 2 | Croo?, Desc, Harn, Lake, Malh | BM, BR | CA, NV, WA + | ||
| Eleocharis bolanderi | Bolander's spikerush | G4 | S2 | 2 | Gran, Lake, Malh, Unio, Wall | BM, BR | CA, ID, NV + | ||
| Eleocharis parvula | Small spikerush | G5 | SH | 2-ex | Till | CR | CA, WA BC + | ||
| Elmera racemosa var. racemosa | Elmera | G4G5T4 | S4 | 4 | Desc, Doug, Jeff, Klam, Lane | WC | WA + | ||
| Elodea nuttallii | Nuttall's waterweed | G5 | SNR | 3 | Colu, Desc, Harn, Lake, Lane, Mult | BR, EC, WC, WV | CA, WA, ID + | ||
| Enemion stipitatum | Dwarf isopyrum | G4? | S3 | 4 | Bent, Doug, Jack, Jose, Klam, Lane, Polk, Yamh | CR?, EC, KM, WC, WV | CA | ||
| Epilobium latifolium | Broad-leaved willow-herb | G5 | S3 | 4 | Desc, Gran, Linn, Wall | BM, WC | CA, ID, WA + | ||
| Epilobium luteum | Yellow willow-herb | G5 | S3 | 4 | Clac, Desc, Doug, Jack, Lane, Linn | BM, WC | CA, WA + | ||
| Epilobium oreganum | Oregon willow-herb | G2 | S1 | SOC | C | 1 | Jose | KM | CA |
| Epilobium palustre | Swamp willow-herb | G5 | SNR | 3 | Doug, Gran?, Hood?, Klam, Unio, Whee? | BM, WC | ID, WA + | ||
| Epilobium rigidum | Rigid willow-herb | G3G4 | S3 | 4 | Curr, Jose | KM | CA | ||
| Epilobium siskiyouense | Siskiyou willow-herb | G3 | S2 | SOC | C | 1 | Jack, Jose | KM | CA |
| Ericameria arborescens | Golden fleece | G4 | S1 | 2 | Curr, Jose | CR, KM | CA, NV | ||
| Ericameria discoidea var. discoidea | Discoid goldenweed | G4G5T4 | S3? | 4 | Harn, Lake | BR | CA, ID, NV + | ||
| Erigeron cascadensis | Cascade daisy | G4 | S4 | 4 | Clac?, Desc?, Doug, Klam, Lane, Linn, Mari | WC | |||
| Erigeron cervinus | Siskiyou daisy | G3 | S2 | SOC | 2 | Curr, Jose | KM | CA | |
| Erigeron decumbens var. decumbens | Willamette Valley daisy | G4T1 | S1 | LE | LE | 1 | Bent, Clac, Lane, Linn, Mari, Polk, Wash, Yamh | WV | |
| Erigeron disparipilus | White cushion erigeron | G5 | S2 | 2 |