CNPS

CNPS Rare Plant Inventory

Species Details

Trifolium polyodon

Pacific Grove clover

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Classification

Scientific Name:
Trifolium polyodon Greene
Common Name:
Pacific Grove clover
Family: Fabaceae
Element Code: PDFAB402H0
USDA Plants Symbol:
Synonyms/Other Names:

Conservation Status

CA Rare Plant Rank: 1B.1
Fed List: None
State List: CR (1979-09-01)
Global Rank: G1
State Rank:
 S1
Other Status: BLM_S; SB_USDA
CRPR Changes:
Add Date: 1974-01-01
Date Edited: 2022-06-08

Ecology and Life History

Lifeform: annual herb
Blooming Period: Apr-Jun(Jul)
Elevation:
5 - 425 meters
15 - 1395 feet
General Habitat:
  • Closed-cone coniferous forest
  • Coastal prairie
  • Meadows and seeps
  • Valley and foothill grassland
General Micro Habitat:
Micro Habitat:
  • Granitic (sometimes)
  • Mesic

Notes

Notes:
Seriously threatened by urbanization, recreation, foot traffic, and trampling. Potentially threatened by non-native plants. A synonym of T. variegatum (phase 4) in The Jepson Manual, but appears to be distinct. See Pittonia 3:215 (1897) for original description.
Threats:
Taxonomy:
Other:

Occurrence Data from the CNDDB

Total Occurrences: 21
Element Occurrence Ranks:
A B C D X U
1 7 5 1 0 7
Occurrence Status:
Historical >20 Years 11
Recent <=20 Years 10
Presence:
Presumed Extant 21
Possibly Extirpated 0
Presumed Extirpated 0

Location

California Endemic:
California Island:
States: Name (Code)
California (CA)
California Counties and Islands: Name (Code)
Marin (MRN), Monterey (MNT), Santa Cruz (SCR), Sonoma (SON)
Quads: Name (Quad Code)
Big Basin (3712222), Drakes Bay (3812218), Felton (3712211), Laurel (3712118), Monterey (3612158), Mt. Carmel (3612147), Petaluma (3812226), Petaluma River (3812225), Seaside (3612157), Spreckels (3612156)
Notes:
Definitions of codes following a county and/or quad:
* Presumed extirpated
(?) Occurrence confirmed, but possibly extirpated
Quad and county data is imported from the CNDDB. Species may be present in other areas where conditions are favorable. These data should NOT be substituted for pre-project review or for on-site surveys.
Regional Map

Map

Presumed Extant
Print this Map
Counties   Quads

Selected References

Suggested Citation:
California Native Plant Society, Rare Plant Program. 2022. Rare Plant Inventory (online edition, v9-01 1.5). Website https://www.rareplants.cnps.org [accessed 5 July 2022].