CNPS

CNPS Rare Plant Inventory

Species Details

Castilleja ambigua var. heckardii

Heckard's owl's-clover

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Photo of Castilleja ambigua var. heckardii
© 2006 Dave Hacker 		Photo of Castilleja ambigua var. heckardii
© 2012 Chris Winchell 		Photo of Castilleja ambigua var. heckardii
©2012 Chris Winchell

  Classification

Scientific Name:
Castilleja ambigua Hook. & Arn. var. heckardii J. M. Egger & Excoffier
Common Name:
Heckard's owl's-clover
Family: Orobanchaceae
Element Code: PDSCR0D405
USDA Plants Symbol:
Synonyms/Other Names:

  Conservation Status

CA Rare Plant Rank: 1B.1
Fed List: None
State List: None
Global Rank: G5T1
State Rank:
 S1
Other Status:
CRPR Changes:
added to 1B.1 on 2022-04-07
Add Date: 2022-04-07
Date Edited: 2023-08-01

  Ecology and Life History

Lifeform: annual herb
Blooming Period: May-Jul
JFMAMJJASOND
Elevation:
50 - 180 meters
165 - 590 feet
General Habitats:
  • Coastal prairie
Microhabitat Details:
Microhabitat:
  • Openings
  • Sandy
  • Vernally Mesic

  Notes

Notes:
Threats:
Potentially threatened by inappropriate grazing and non-native plants.
Taxonomy:
Previously identified as C. ambigua ssp. ambigua and ssp. insalutata.

  Threat List Data from the CNDDB

Threat List Total: 0
Total EOs % of EOs
EOs with Threat Listed: 0 %
THREAT LIST:
No threats

  Occurrence Data from the CNDDB

Total Occurrences: 5
Element Occurrence Ranks:
A B C D X U
0 0 0 0 0 5
Occurrence Status:
Historical >20 Years 3
Recent <=20 Years 2
Presence:
Presumed Extant 5
Possibly Extirpated 0
Presumed Extirpated 0

  Location

California Endemic:
California Island:
States: Name (Code)
California (CA)
California Counties and Islands: Name (Code)
San Luis Obispo (SLO)
Quads: Name (Quad Code)
Burro Mountain (3512173), Piedras Blancas (3512163)
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

CNPS Status Review: Proposed Addition to CRPR 1B.1, G5T1 / S1 (2022)
Original Description: Phytoneuron 15: 1–17 (2021)
Suggested Citation:
California Native Plant Society, Rare Plant Program. 2023. Rare Plant Inventory (online edition, v9.5). Website https://www.rareplants.cnps.org [accessed 27 September 2023].