Taxon Details

Chorizanthe biloba var. immemora

Hernandez spineflower

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Taxon Summary:

Chorizanthe biloba var. immemora, commonly known as Hernandez spineflower, is a annual herb in the Polygonaceae that is found only in California. It occurs within Chaparral, and Cismontane woodland, growing at elevations from 425 to 1115 meters. Chorizanthe biloba var. immemora is ranked 1B.2, Plants Rare, Threatened or Endangered in California and Elsewhere; Moderately threatened in California.

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:
Name Status:	JEF, FNA, POWO, IPNI, Tropicos

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)

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:
Threat List Total:	0
	Total EOs	% of EOs
EOs with Threat Listed:	0	%

Occurrence Data from the CNDDB

Element Occurrence Ranks:
Total Occurrences:					12
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

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CNPS Rare Plant Inventory