Trifolium trichocalyx
Common Name: Monterey clover
Family: Fabaceae
Element Code: PDFAB402J0
Full Name: Trifolium trichocalyx Heller

2011 Kerry Heise
Biology Glossary
Rarity Status Glossary
Occurrence Data from CDFW
California Natural Diversity Database Glossary
  • Total # of Known Element Occurrences: 6
  • Element Occurrence Ranks:
    A B C D X U
    0 4 1 0 0 1
  • Population Status:
    >20 yrs
    <=20 yrs
    1 5
  • Presence:
    Present Extant Possibly Extirpated Presumed Extirpated
    6 0 0
Notes Glossary
  • 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 MadroƱo 59(3):167 (2012) for discovery of MEN Co. occurrence.
  • To submit rare plant observation data, use the CNDDB field survey form. Please see also the CNPS Rare Plant Data page.
  • Date Added: 1974-01-01
  • Last Update: 2017-11-16
Location Glossary
  • Elevation: 30 - 305 meters
  • California Endemic: yes
  • Other States:
  • California Counties and Islands:   name (code)
    Mendocino (MEN),  Monterey (MNT)
  • Quads:   name (DWR code) USGS code
    Monterey (366C) 3612158,  Eureka Hill (537A) 3812385,  Point Arena (537B) 3812386,  Fouts Springs (564C) 3912236,  Mathison Peak (568C) 3912336
  • 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 1533
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 [accessed ].

3612158=Monterey (366C) 3612158;3812385=Eureka Hill (537A) 3812385;3812386=Point Arena (537B) 3812386;3912236=Fouts Springs (564C) 3912236;3912336=Mathison Peak (568C) 3912336