CNPS.ORG Inventory of Rare and Endangered Plants - 7th edition interface
v7-18mar 3-19-18
Status: record thelypodium_howellii_ssp._howellii - Sat, Dec. 4, 2021, 21:00 ET b
Thelypodium howellii ssp. howellii
common nameHowell's thelypodium
CalPhotos image
more photos
© 1990 Dean Wm. Taylor  Follow image link for photo data.
life formperennial herb
CA Rare Plant Rank
List 1B.2
LIST 1B: Rare, threatened, or endangered in California and elsewhere.
     0.2: Fairly endangered in California
state rank
S1      ranking system key
global rank
G1T1      ranking system key
Where did the "RED" code go?
CA state listingNone  
federal listingNone  
where found
MAPS - Use v8 link below.

Topographic quads (13):
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
quad data info

Counties, states, regions:
Lassen (LAS), Modoc (MOD), Shasta (SHA), Oregon (OR)*, Washington (WA)*
A reminder: Species not recorded for a given area may nonetheless be present, especially where favorable conditions occur.
CNPS habitats•Great Basin scrub (GBScr)
•Meadows and seeps (Medws)(alkaline)
blooming period May-Jul  
elevation range1200 - 1830 meters
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.
full nameThelypodium howellii Wats. ssp. howellii
Version 8    INVENTORY VERSION 8 interface for this taxon, including GIS and more links

Additional information:
standard acronym  THHOH Element Code  PDBRA2N051
CalFlora species this taxon    CalFlora genus related taxa
Jepson Online Jepson Interchange  Jepson Manual and other resources
Google search
search Google CNPS website    search Google entire web

Suggested citation: California Native Plant Society (CNPS). 2018. Inventory of Rare and Endangered Plants (online edition, v7-18mar). California Native Plant Society. Sacramento, CA. Accessed on Sat, Dec. 4, 2021 from

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