*The database used to provide updates to the Online Inventory is under construction. View updates and changes made since May 2019 here.
Thelypodium howellii ssp. howellii
Common Name: Howell's thelypodium
Family: Brassicaceae
Element Code: PDBRA2N051
Full Name: Thelypodium howellii Wats. ssp. howellii

Biology Glossary
Rarity Status Glossary
Occurrence Data from CDFW
California Natural Diversity Database Glossary
  • Total # of Known Element Occurrences: 11
  • Element Occurrence Ranks:
    A B C D X U
    0 1 0 0 0 10
  • Population Status:
    >20 yrs
    <=20 yrs
    10 1
  • Presence:
    Present Extant Possibly Extirpated Presumed Extirpated
    11 0 0
Notes Glossary
  • 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.
  • To submit rare plant observation data, use the CNDDB field survey form. Please see also the CNPS Rare Plant Data page.
  • Date Added: 2001-01-01
  • Last Update: 2019-05-08
Location Glossary
  • Elevation: 1200 - 1830 meters
  • California Endemic: no
  • Other States: Oregon, Washington
  • California Counties and Islands:   name (code)
    Lassen (LAS),  Modoc (MOD),  Shasta (SHA)
  • Quads:   name (DWR code) USGS code
    Spalding Tract (641A) 4012067,  Buckhorn Lake (656A) 4012081,  Observation Peak (656C) 4012072,  Dixie Peak (660A) 4012181,  Straylor Lake (660D) 4012171,  Ash Valley (675C) 4112016,  Big Swamp (677A) 4112121,  Bieber (677C) 4112112,  Pittville (678D) 4112113,  Canby (693A) 4112047,  Leonards Hot Springs (707D) 4112051,  Boles Meadows East (710A) 4112067,  Jacks Butte (710D) 4112057
  • Notes:
      Definitions of codes preceding a county and/or quad:
      * Presumed extirpated
      ? Uncertain about distribution or identity
      ?* Uncertain about distribution, but presumed extirpated if once present
      (?) Occurrence confirmed, but possibly extirpated
      Species may be present in other areas where conditions are favorable. This data should NOT be substituted for pre-project review or for on-site surveys.
Presumed Extant Presumed Extirpated or Unknown 657
Links to Leading Resources of Taxon Information
Suggested Citation
California Native Plant Society, Rare Plant Program. . Inventory of Rare and Endangered Plants of California (online edition, v8-03). Website http://www.rareplants.cnps.org [accessed ].

4012067=Spalding Tract (641A) 4012067;4012081=Buckhorn Lake (656A) 4012081;4012072=Observation Peak (656C) 4012072;4012181=Dixie Peak (660A) 4012181;4012171=Straylor Lake (660D) 4012171;4112016=Ash Valley (675C) 4112016;4112121=Big Swamp (677A) 4112121;4112112=Bieber (677C) 4112112;4112113=Pittville (678D) 4112113;4112047=Canby (693A) 4112047;4112051=Leonards Hot Springs (707D) 4112051;4112067=Boles Meadows East (710A) 4112067;4112057=Jacks Butte (710D) 4112057