CNPS.ORG Inventory of Rare and Endangered Plants - 7th edition interface
v7-18mar 3-19-18
Status: record trifolium_trichocalyx - Mon, Sep. 16, 2019 13:27 ET c
Trifolium trichocalyx
common nameMonterey clover
CalPhotos image
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life formannual herb
CA Rare Plant Rank
List 1B.1
LIST 1B: Rare, threatened, or endangered in California and elsewhere.
     0.1: Seriously endangered in California
state rank
S1      ranking system key
global rank
G1     G1: Less than 6 occurrences OR less than 1,000 individuals OR less than 2,000 acres.
Where did the "RED" code go?
CA state listingEndangered  11/79
federal listingEndangered  08/12/98
where found
MAPS - Use v8 link below.

Topographic quads (5):
Monterey (366C) 3612158, Eureka Hill (537A) 3812385, Point Arena (537B) 3812386, Fouts Springs (564C) 3912236, Mathison Peak (568C) 3912336
quad data info

Counties, states, regions:
Mendocino (MEN), Monterey (MNT)
A reminder: Species not recorded for a given area may nonetheless be present, especially where favorable conditions occur.
CNPS habitats•Closed-cone coniferous forest (CCFrs)(sandy, openings, burned areas)
blooming period Apr-Jun  
elevation range30 - 305 meters
Discovered in Big River Forest (TCF), MEN Co. by K. Heise and G. Hulse-Stephens in 2011. Previously known from only two occurrences from the central portion of the Monterey Peninsula; where fewer than 1000 plants seen in 1987, none in 1992, and only 22 in 1995. Seriously threatened by urbanization and altered fire regimes. Appears to be a fire follower. Possibly of hybrid origin. See Muhlenbergia 1:55 (1904) for original description and Madroņo 59(3):167 (2012) for discovery of MEN Co. occurrence.
full nameTrifolium trichocalyx Heller
Version 8    INVENTORY VERSION 8 interface for this taxon, including GIS and more links

Additional information:
standard acronym  TRTR Element Code  PDFAB402J0
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 Mon, Sep. 16, 2019 from

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