CNPS

CNPS Rare Plant Inventory

Species Details

Chorizanthe biloba var. immemora

Hernandez spineflower

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  Classification

Scientific Name:
Chorizanthe biloba Goodm. var. immemora Rev. & Hardham
Common Name:
Hernandez spineflower
Family: Polygonaceae
Element Code: PDPGN04025
USDA Plants Symbol: CHBII
Synonyms/Other Names:

  Conservation Status

CA Rare Plant Rank: 1B.2
Fed List: None
State List: None
Global Rank: G3T1T2
State Rank:
 S1S2
Other Status: BLM_S
CRPR Changes:
Add Date: 1994-01-01
Date Edited: 2021-10-04

  Ecology and Life History

Lifeform: annual herb
Blooming Period: May-Aug(Sep)
JFMAMJJASOND
Elevation:
425 - 1115 meters
1395 - 3660 feet
General Habitats:
  • Chaparral
  • Cismontane woodland
Microhabitat Details:
Microhabitat:
  • Clay (sometimes)
  • Gravelly (often)
  • Serpentine (usually)

  Notes

Notes:
Known from approximately five occurrences. See Phytologia 66(2):137-139 (1989) for original description.
Threats:
Taxonomy:

  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: 12
Element Occurrence Ranks:
A B C D X U
0 0 0 0 0 12
Occurrence Status:
Historical >20 Years 4
Recent <=20 Years 8
Presence:
Presumed Extant 12
Possibly Extirpated 0
Presumed Extirpated 0

  Location

California Endemic:
California Island:
States: Name (Code)
California (CA)
California Counties and Islands: Name (Code)
Monterey (MNT), San Benito (SBT)
Quads: Name (Quad Code)
Cholame Valley (3512073), Hepsedam Peak (3612037), Hernandez Reservoir (3612047), Lonoak (3612038), Priest Valley (3612026), Rock Spring Peak (3612048), San Benito (3612151), San Benito Mtn. (3612036), Topo Valley (3612141)
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 4 December 2024].