CNPS

CNPS Rare Plant Inventory

Species Details

Chorizanthe cuspidata var. villosa

woolly-headed spineflower

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  Classification

Scientific Name:
Chorizanthe cuspidata Wats. var. villosa (Eastw.) Munz
Common Name:
woolly-headed spineflower
Family: Polygonaceae
Element Code: PDPGN04082
USDA Plants Symbol: CHCUV
Synonyms/Other Names:

  Conservation Status

CA Rare Plant Rank: 1B.2
Fed List: None
State List: None
Global Rank: G2T2
State Rank:
 S2
Other Status:
CRPR Changes:
Add Date: 1994-01-01
Date Edited: 2021-10-04

  Ecology and Life History

Lifeform: annual herb
Blooming Period: May-Jul(Aug)
JFMAMJJASOND
Elevation:
3 - 60 meters
10 - 195 feet
General Habitats:
  • Coastal dunes
  • Coastal prairie
  • Coastal scrub
Microhabitat Details:
Microhabitat:
  • Sandy

  Notes

Notes:
Threatened by agriculture, development and non-native plants. See C. cuspidata in The Jepson Manual. See Bulletin of the Torrey Botanical Club 30:485 (1903) for original description, and Phytologia 66(2):127-130 (1989) for taxonomic treatment.
Threats:
Taxonomy:

  Threat List Data from the CNDDB

Threat List Total: 8
Total EOs % of EOs
EOs with Threat Listed: 9 53 %
THREAT LIST:
Non-native plant impacts 7 41%
Agriculture 2 11%
Development 1 5%
Disking 1 5%
Foot traffic/trampling 1 5%

  Occurrence Data from the CNDDB

Total Occurrences: 17
Element Occurrence Ranks:
A B C D X U
0 7 1 0 0 9
Occurrence Status:
Historical >20 Years 10
Recent <=20 Years 7
Presence:
Presumed Extant 17
Possibly Extirpated 0
Presumed Extirpated 0

  Location

California Endemic:
California Island:
States: Name (Code)
California (CA)
California Counties and Islands: Name (Code)
Marin (MRN), Sonoma (SON)
Quads: Name (Quad Code)
Bodega Head (3812331), Drakes Bay (3812218), Plantation (3812353), Tomales (3812228), Valley Ford (3812238)
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
Click on quad for name. Hold Shift Key to use mouse scroll wheel

  Selected References

Suggested Citation:
California Native Plant Society, Rare Plant Program. 2024. Rare Plant Inventory (online edition, v9.5). Website https://www.rareplants.cnps.org [accessed 24 April 2024].