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Washington Natural Heritage Information System
List of Known Occurrences of Rare Plants in Washington
August 2012

Whitman County

A key to status fields appears below. If a scientific name is underlined you may click on it to go to a field guide page (pdf format, average size 300 kb) for that taxon.

Scientific Name
Common Name
State Status
Federal Status
Historic Record
Allium bisceptrum twincrest onion S
Ammannia robusta grand redstem T
Anagallis minima chaffweed S H
Anthoxanthum hirtum common northern sweet grass R1 H
Astragalus arrectus Palouse milk-vetch T
Astragalus riparius Piper's milk-vetch E
Bergia texana Texas bergia R1 H
Calochortus longebarbatus var. longebarbatus long-bearded sego lily S SC H
Calochortus nitidus broad-fruit mariposa E SC H
Cheilanthes feei Fee's lip-fern T H
Corispermum pacificum common bugseed R2 H
Cryptantha rostellata beaked cryptantha T
Cypripedium fasciculatum clustered lady's-slipper S SC
Eleocharis coloradoensis dwarf spike-rush R1 H
Eryngium articulatum jointed coyote-thistle X H
Githopsis specularioides common blue-cup S H
Lipocarpha aristulata awned halfchaff sedge T H
Lomatium serpentinum Snake Canyon desert-parsley S H
Lupinus sericeus var. asotinensis Asotin silky lupine R1
Lycopodium lagopus one-cone ground-pine R1 H
Mimulus pulsiferae Pulsifer's monkey-flower S H
Minuartia pusilla var. pusilla annual sandwort R1 H
Muhlenbergia mexicana var. mexicana Mexican muhly S H
Oenothera cespitosa ssp. marginata tufted evening-primrose T H
Penstemon wilcoxii Wilcox's penstemon S H
Polemonium pectinatum Washington polemonium T SC
Pyrrocoma liatriformis Palouse goldenweed E SC
Ranunculus hebecarpus downy butter-cup R1 H
Ribes oxyacanthoides ssp. irriguum Idaho gooseberry T H
Rotala ramosior lowland toothcup T H
Rubus nigerrimus northwest raspberry T SC
Salix monochroma one-color willow R1 H
Silene spaldingii Spalding's silene T LT
Spartina pectinata prairie cordgrass S H
Symphyotrichum jessicae Jessica's aster E SC
Trichostema oblongum oblong bluecurls R1 H
Trifolium douglasii Douglas' clover E SC H
Description of Codes
Historic Record:
H indicates most recent sighting in the county is before 1977.
State Status
State Status of plant species is determined by the Washington Natural Heritage Program. Factors considered include abundance, occurrence patterns, vulnerability, threats, existing protection, and taxonomic distinctness.
Values include:
E = Endangered. In danger of becoming extinct or extirpated from Washington.
T = Threatened. Likely to become Endangered in Washington.
S = Sensitive. Vulnerable or declining and could become Endangered or Threatened in the state.
X = Possibly extinct or Extirpated from Washington.
R1 = Review group 1. Of potential concern but needs more field work to assign another rank.
R2 = Review group 2. Of potential concern but with unresolved taxonomic questions.
Federal Status
Federal Status under the U.S. Endangered Species Act(USESA) as published in the Federal Register:
LE = Listed Endangered. In danger of extinction.
LT = Listed Threatened. Likely to become endangered.
PE = Proposed Endangered.
PT = Proposed Threatened.
C = Candidate species. Sufficient information exists to support listing as Endangered or Threatened.
SC = Species of Concern. An unofficial status, the species appears to be in jeopardy, but insufficient information to support listing.

Washington Natural Heritage Program - www.dnr.wa.gov/ResearchScience/Topics/NaturalHeritage/Pages/amp_nh.aspx/
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Washington Dept. of Natural Resources, PO Box 47016, Olympia, WA 98504-7016