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ODA Plant Division, Plant Conservation
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Oregon listed plants
Overview
Endangered plant species
Threatened plant species
Candidate plant species
Threatened and endangered plant definitions
Overview
Currently, there are 60 plant species that are administratively protected in the State of Oregon.  Of these 60 species, 30 are listed as endangered and 28 are listed as threatened.  Two species, Arabis macdonaldiana (pdf, 399 KB) and Howellia aquatilis, have been federally listed, but the Oregon Administrative Rules (OAR 603-073) have not been updated to reflect the state protection that is conferred by federal listing.  All federally listed plant species occurring in Oregon are administratively protected by the Oregon Department of Agriculture.  In addition, Oregon has 76 candidate species. 
 
Endangered plant species
 
Scientific Name  Common Names
Abronia umbellata ssp. breviflora  Pink sandverbena
Arabis macdonaldiana* Red Mountain rockcress
Artemisia campestris ssp. borealis var. wormskioldii   Northern wormwood
Astragalus applegatei  Applegate's milkvetch
Astragalus mulfordiae  Mulford's milkvetch
Calochortus coxii  Crinite mariposa lily
Calochortus indecorus  Sexton Mountain mariposa lily
Calochortus umpquaensis  Umpqua mariposa lily
Castilleja levisecta  Golden paintbrush
Cordylanthus maritimus ssp. palustris  Point Reyes bird's-beak
Delphinium leucophaeum  White rock larkspur
Delphinium pavonaceum  Peacock larkspur
Erigeron decumbens  Willamette daisy
Fritillaria gentneri  Gentner's fritillary
Haplopappus radiatus  Snake River goldenweed
Ivesia rhypara var. rhypara  Grimy ivesia
Lilium occidentale  Western lily
Limnanthes floccosa ssp. grandiflora  Big-flowered wooly meadowfoam
Lomatium bradshawii  Bradshaw's desert parsley
Lomatium cookii  Cook's desert parsley
Lomatium erythrocarpum  Red-fruited lomatium
Lupinus cusickii  Cusick's lupine
Mentzelia mollis  Smooth mentzelia
Mirabilis macfarlanei  Macfarlane's four o'clock
Plagiobothrys hirtus  Rough popcornflower, rough allocarya
Plagiobothrys lamprocarpus  Shiny-fruited allocarya
Ranunculus reconditus  Dalles Mountain buttercup
Silene spaldingii  Spalding's campion
Stephanomeria malheurensis  Malheur wire-lettuce
Thelypodium howellii ssp. spectabilis  Howell's spectacular thelypody
Trifolium owyheense  Owyhee clover
 
* Species has been listed federally, but the Oregon Administrative Rules (OAR 603-073) have not yet been updated.  All federally listed plant species occurring in Oregon are administratively protected by the State of Oregon. 
Threatened plant species
 
Scientific Name  Common Name
Amsinckia carinata 
Malheur Valley fiddleneck
Aster curtus 
White-topped aster
Aster vialis 
Wayside aster
Astragalus collinus var. laurentii Laurent's milkvetch
Astragalus diaphanus var. diurnus 
South Fork John Day milkvetch
Astragalus peckii 
Peck's milkvetch
Astragalus sterilis
Sterile milkvetch
Astragalus tyghensis 
Tygh Valley milkvetch
Botrychium pumicola  Pumice grape-fern
Calochortus howellii  Howell's mariposa lily
Eriogonum chrysops Golden buckwheat
Eriogonum crosbyae
Crosby's buckwheat
Erythronium elegans
Coast Range fawn lily
Gratiola heterosepala Boggs Lake hedge hyssop
Hackelia cronquistii 
Cronquist's stickseed
Hastingsia bracteosa 
Large-flowered rush lily
Howellia aquatilis* Howellia
Lepidium davisii 
Davis' peppergrass
Limnanthes floccosa ssp. pumila 
Dwarf meadowfoam
Lomatium greenmanii
Greenman's desert parsley
Lupinus sulphureus ssp. kincaidii Kincaid's lupine
Mentzelia packardiae Packard's mentzelia
Microseris howellii Howell's microseris
Oenothera wolfii  Wolf's evening-primrose
Phacelia argentea Silvery phacelia
Pleuropogon oregonus Oregon semaphore grass
Sidalcea nelsoniana Nelson's checkermallow
Silene douglasii var. oraria Cascade Head catchfly
Thelypodium eucosmum Arrow-leaf thelypody
 
* Species has been listed federally, but the Oregon Administrative Rules (OAR 603-073) have not yet been updated.  All federally listed plant species occurring in Oregon are administratively protected by the State of Oregon. 
Candidate plant species

Scientific Name  Common Name
 Achnatherum hendersonii  Henderson ricegrass
 Agrostis howellii  Howell's bentgrass
 Arabis koehleri var. koehleri  Koehler's rockcress, shrubby rockcress
 Arabis suffrutescens var. horizontalis  Crater Lake rockcress
 Asarum wagneri  Green-flowered wild ginger
 Astragalus tegetarioides  Deschutes milkvetch, bastard kentrophyta
 Bensoniella oregana  Bensoniella
 Bolandra oregana  Oregon bolandra
 Botrychium ascendens  Upswept moonwort, upward-lobed moonwort
 Botrychium crenulatum  Dainty moonwort, crenulate grape-fern
 Botrychium paradoxum  Paradox moonwort, twin-spike moonwort
 Botrychium pedunculosum  Stalked moonwort
 Calochortus greenei  Greene's mariposa lily
 Calochortus longebarbatus var. peckii  Peck's mariposa lily
 Calochortus persistens  Siskiyou mariposa lily
 Camassia howellii  Howell's camassia
 Camissonia pygmaea  Pygmy evening primrose, dwarf evening primrose
 Cardamine nuttallii var. gemmata  Purple dentaria, purple toothwort
 Cardamine pattersonii  Saddle Mountain bittercress
 Carex constanceana  Constance's sedge
 Caulanthus major var. nevadensis  Nevada wild cabbage, slender wild cabbage
 Cimicifuga elata  Tall bugbane
 Collomia renacta  Barren Valley collomia
 Corydalis aquae-gelidae  Clackamas corydalis, cold water corydalis
 Cypripedium fasciculatum  Clustered lady slipper
 Delphinium oreganum  Willamette Valley larkspur
 Draba howellii  Howell's whitlow grass
 Epilobium oreganum  Oregon willowherb
 Epilobium siskiyouense  Siskiyou willowherb
 Erigeron howellii  Howell's daisy, Howell's fleabane
 Erigeron oreganus  Oregon daisy, Oregon fleabane
 Eriogonum cusickii  Cusick's buckwheat, Cusick's eriogonum 
 Eriogonum prociduum  Prostrate buckwheat
 Filipendula occidentalis  Queen of the forest
 Frasera umpquaensis  Umpqua frasera, Umpqua swertia
 Gentiana setigera  Elegant gentian, Waldo gentian
 Hackelia diffusa var. diffusa  Diffuse stickseed
 Horkelia congesta ssp. congesta  Shaggy horkelia
 Lasthenia macrantha ssp. prisca  Large flowered goldfields, perennial lasthenia
 Leptodactylon pungens ssp. hazeliae  Snake River prickly phlox, Hazel's prickly phlox
 Limbella fryei  Frye's limbella moss
 Limnanthes floccosa ssp. bellingeriana  Bellinger's meadowfoam
 Limnanthes gracilis var. gracilis  Slender meadowfoam
 Lomatium suksdorfii  Suksdorf's lomatium
 Luina serpentina*  Colonial luina
 Lupinus lepidus var. ashlandensis  Ashland lupine, Mount Ashland lupine
 Meconella oregana  White meconella
 Mimulus evanescens  Disappearing monkeyflower
 Mimulus hymenophyllus  Thinsepal monkeyflower, membrane-leaved monkeyflower
 Mimulus jungermannioides  Jungermann's monkeyflower, hepatic monkeyflower
 Mimulus patulus*  Stalk leaved monkeyflower
 Montia howellii  Howell's montia
 Myosurus sessilis  Sessile mousetail
 Penstamon barrettiae  Barrett's penstemon
 Perideridia erythrorhiza  Red root yampah
 Phacelia minutissima  Least phacelia
 Plagiobothrys figuratus ssp. corallicarpus  Coral seeded allocarya
 Ranunculus austrooreganus  Southern Oregon buttercup
 Rorippa columbiae  Columbia cress
 Rubus bartonianus  Bartonberry
 Saxifraga hitchcockiana  Saddle Mountain saxifrage
 Sedum moranii  Rogue River stonecrop
 Sedum oblanceolatum  Applegate stonecrop
 Senecio ertterae*  Ertter's senecio
 Senecio hesperius  Western senecio
 Sidalcea campestris  Meadow sidalcea, meadow checkermallow
 Sidalcea hirtipes  Hairy stemmed checkermallow, bristly-stemmed sidalcea
 Sidalcea malviflora ssp. patula  Mallow sidalcea, coast checker bloom
 Sisyrinchium sarmentosum  Pale blue eyed grass
 Sophora leachiana  Western sophora, western necklace
 Streptanthus howellii  Howell's streptanthus
 Sullivantia oregana  Oregon sullivantia, sullivantia
 Tauschia howellii  Howell's tauschia
 Trifolium leibergii  Leiberg's clover
 Triteleia hendersonii var. leachiae  Leach's brodiaea, blue-striped brodiaea
 Viola primulifolia ssp. occidentalis  Western bog violet
 
* Species was previously listed as threatened or endangered by the Oregon Department of Agriculture, but has since been delisted. 
Threatened and endangered plant definitions
Endangered species

(a) Any native plant species determined by the director to be in danger of extinction throughout all or any significant portion of its range; or

(b) Any plant species listed as an endangered species pursuant to the federal Endangered Species Act of 1973 (PL 93-205, 16 USC § 1531), as amended.

          
Threatened species 

(a) Any native plant species the director determines is likely to become endangered within the foreseeable future throughout all or any significant portion of its range; or
     
(b) Any plant species listed as a threatened species pursuant to the federal Endangered Species Act of 1973 (PL 93-205, 16 U.S.C. § 1531), as amended.
 
 
Candiate species
 
Any plant species designated for study by the director (of the Oregon Department of Agriculture) whose numbers are believed low or declining, or whose habitat is sufficiently threatened and declining in quantity and quality, so as to potentially qualify for listing as a threatened or endangered species in the foreseeable future.
 
 
Delisted species
 
Any plant species, previously listed as threatened or endangered by the Oregon Department of Agriculture, which has been removed from list.  All delisted species are placed on the candidate species list. 
 
Page updated: November 17, 2008

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