CNPS.ORG Inventory of Rare and Endangered Plants - 7th edition interface
v7-18mar 3-19-18
Status: record trifolium_amoenum - Sat, Dec. 4, 2021, 04:07 ET b
Trifolium amoenum
common nametwo-fork clover
CalPhotos image
more photos
Doreen L. Smith © 1997 Doreen L. Smith  Follow image link for photo data.
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 listingNone  
federal listingEndangered  10/22/97
where found
MAPS - Use v8 link below.

Topographic quads (19):
Gilroy (406D)* 3712115, Palo Alto (428B) 3712242, San Francisco South (448B) 3712264, San Quentin (466B)* 3712284, San Rafael (467A) 3712285, Bolinas (467B)* 3712286, Cuttings Wharf (483A)* 3812223, Petaluma (484B)* 3812226, Drakes Bay (485C)* 3812218, Inverness (485D)* 3812217, Elmira (498C)* 3812138, Napa (500D)* 3812233, Kenwood (501A)* 3812245, Santa Rosa (501B)* 3812246, Cotati (501C)* 3812236, Sebastopol (502A)* 3812247, Camp Meeker (502B)* 3812248, Valley Ford (502C) 3812238, Duncans Mills (503A)(*?) 3812341
quad data info

Counties, states, regions:
Marin (MRN), Napa (NAP)*, Santa Clara (SCL)*, San Mateo (SMT), Solano (SOL)*, Sonoma (SON)(*?)
A reminder: Species not recorded for a given area may nonetheless be present, especially where favorable conditions occur.
CNPS habitats•Coastal bluff scrub (CBScr)
•Valley and foothill grassland (VFGrs)(sometimes serpentinite)
blooming period Apr-Jun  
elevation range5 - 415 meters
Rediscovered in 1993 by P. Conners near Occidental; only one plant found, and subsequent surveys in 1994-1995 unsuccessful. Another occurrence (502C) discovered in 1996. Historical habitat lost to urbanization and agriculture. See Flora Franciscana, p. 27 (1891) by E. Greene for original description, and Fremontia 22(2):3-7 (1994) for account of rediscovery.
full nameTrifolium amoenum Greene
Version 8    INVENTORY VERSION 8 interface for this taxon, including GIS and more links

Additional information:
standard acronym  TRAM3 Element Code  PDFAB40040
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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