CNPS.ORG Inventory of Rare and Endangered Plants - 7th edition interface
v7-18mar 3-19-18
Status: record mentzelia_tricuspis - Fri, Nov. 26, 2021 22:24 ET c
Mentzelia tricuspis
common namespiny-hair blazing star
CalPhotos image
more photos
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life formannual herb
CA Rare Plant Rank
List 2B.1
LIST 2B: Rare, threatened, or endangered in California, but more common elsewhere.
     0.1: Seriously endangered in California
state rank
S2      ranking system key
global rank
G4     G4: apparently secure, but some concern
CA state listingNone  
federal listingNone  
where found
MAPS - Use v8 link below.

Topographic quads (14):
In-ko-pah Gorge (007A) 3211661, Cottonwood Spring (063A) 3311567, White Water (083B) 3311686, Beaumont (084B) 3311688, Havasu Lake (121B) 3411444, Topock (146B) 3411464, Monumental Pass (147B) 3411466, Needles (172D) 3411475, Bannock (173A) 3411487, Flattop Mountain (173D) 3411477, Barstow (182A) 3411781, Mount Manchester (197C) 3511416, East Of Homer Mountain (198D) 3511417, Blackwater Mine (274D) 3511577
quad data info

Counties, states, regions:
Inyo (INY), Riverside (RIV)?, San Bernardino (SBD), San Diego (SDG), Arizona (AZ), Nevada (NV), Utah (UT)
A reminder: Species not recorded for a given area may nonetheless be present, especially where favorable conditions occur.
CNPS habitats•Mojavean desert scrub (MDScr)/sandy, gravelly, slopes, and washes
blooming period Mar-May  
elevation range150 - 1280 meters
Single record from IMP Co. is likely M. hirsutissima. Occurrences from RIV Co. need quads and verification. Need quads for INY Co. Possibly threatened by renewable energy development.
full nameMentzelia tricuspis A. Gray
Version 8    INVENTORY VERSION 8 interface for this taxon, including GIS and more links

Additional information:
standard acronym  METR2 Element Code  PDLOA031T0
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 Fri, Nov. 26, 2021 from

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