Taxon Details

Chorizanthe blakleyi

Blakley's spineflower

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Taxon Summary:

Chorizanthe blakleyi, commonly known as Blakley's spineflower, is a annual herb in the Polygonaceae that is found only in California. It occurs within Chaparral, and Pinyon and juniper woodland, growing at elevations from 600 to 1600 meters. Chorizanthe blakleyi is ranked 1B.3, Plants Rare, Threatened or Endangered in California and Elsewhere; Not very threatened in California.

Classification

Scientific Name: Chorizanthe blakleyi Hardham
Common Name: Blakley's spineflower
Family:	Polygonaceae
Element Code:	PDPGN04030
USDA Plants Symbol:	CHBL
Synonyms/Other Names:
Name Status:	JEF, FNA, POWO, IPNI, Tropicos

Conservation Status

CA Rare Plant Rank:	1B.3
Fed List:	None
State List:	None
Global Rank:	G2
State Rank:	S2
Other Status:	BLM_S; USFS_S
CRPR Changes:
Add Date:	1974-01-01
Date Edited:	2021-05-26

Ecology and Life History

Lifeform: annual herb

Blooming Period: Apr-Jun

Elevation:
600 - 1600 meters
1970 - 5250 feet

General Habitats:

Chaparral
Pinyon and juniper woodland

Microhabitat Details:

Microhabitat:

Notes

Notes: Possibly threatened by vehicles, recreation, road maintenance, grazing, trampling, and non-native plants. Closely related to C. palmeri. See Leaflets of Western Botany 10:95 (1964) for original description, and Phytologia 66(2):141-142 (1989) for taxonomic treatment.
Threats:
Taxonomy:

Threat List Data from the CNDDB

THREAT LIST:
Threat List Total:	5
	Total EOs	% of EOs
EOs with Threat Listed:	3	25 %
Foot traffic/trampling	2	16%
Non-native plant impacts	1	8%
ORV activity	1	8%
Recreational use (non-ORV)	1	8%
Road/trail construction/maint.	1	8%

Occurrence Data from the CNDDB

Element Occurrence Ranks:
Total Occurrences:					12
A	B	C	D	X	U
0	3	1	0	0	8

Occurrence Status:
Historical >20 Years	11
Recent <=20 Years	1

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)
Santa Barbara (SBA), Ventura (VEN)

Quads: Name (Quad Code)
Bates Canyon (3411988), Caliente Mtn. (3511917), Hurricane Deck (3411977), New Cuyama (3411986), Peak Mountain (3411987), Reyes Peak (3411963), Salisbury Potrero (3411976), Taylor Canyon (3511918)

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