Species Details

Thelypodium howellii ssp. howellii

Howell's thelypodium

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Photo by ©1990 Dean Wm. Taylor  max-height:128px; max-width:145px;
©1990 Dean Wm. Taylor
Scientific Name:
Thelypodium howellii Wats. ssp. howellii
Common Name:
Howell's thelypodium
Family: Brassicaceae
Element Code: PDBRA2N051
USDA Plants Symbol: THHOH
Synonyms/Other Names:
Lifeform: perennial herb
Blooming Period: May-Jul
Elevation:
1200 - 1830 meters
3935 - 6005 feet
General Habitat:
  • Great Basin scrub
  • Meadows and seeps (alkaline)
General Micro Habitat:
Micro Habitat:
Notes:
Known in CA from fewer than twenty occurrences. Endangered in OR. See Proceedings of the American Academy of Arts and Sciences 21:445 (1886) for original description, and Contributions from the Gray Herbarium 204:115-116 (1973) for taxonomic treatment.
Threats:
Taxonomy:
Other:
Total Occurrences: 11
Element Occurrence Ranks:
A B C D X U
0 1 0 0 0 10
Occurrence Status:
Historical >20 Years 10
Recent <=20 Years 1
Presence:
Presumed Extant 11
Possibly Extirpated 0
Presumed Extirpated 0
California Endemic:
California Island:
States: Name (Code)
California (CA), Oregon (OR)*, Washington (WA)*
California Counties and Islands: Name (Code)
Lassen (LAS), Modoc (MOD), Shasta (SHA)
Quads: Name (Quad Code)
Ash Valley (4112016), Big Swamp (4112121), Boles Meadows East (4112067), Buckhorn Lake (4012081), Canby (4112047), Dixie Peak (4012181), Jacks Butte (4112057), Leonards Hot Springs (4112051), Observation Peak (4012072), Pittville (4112113), Sheepshead (4012077), Spalding Tract (4012067), Straylor Lake (4012171)
Notes:
Definitions of codes following a county and/or quad:
* Presumed extirpated
(?) Occurrence confirmed, but possibly extirpated
Quad and county data is imported from the CNDDB. Species may be present in other areas where conditions are favorable. These data should NOT be substituted for pre-project review or for on-site surveys.

Map

Presumed Extant
Counties   Quads