Taxon Details

Plagiobothrys chorisianus var. chorisianus

Choris' popcornflower

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Taxon Summary:

Plagiobothrys chorisianus var. chorisianus, commonly known as Choris' popcornflower, is a annual herb in the Boraginaceae that is found only in California. It occurs within Chaparral, Coastal prairie, and Coastal scrub, growing at elevations from 3 to 160 meters. Plagiobothrys chorisianus var. chorisianus is ranked 1B.2, Plants Rare, Threatened or Endangered in California and Elsewhere; Moderately threatened in California.

Classification

Scientific Name: Plagiobothrys chorisianus (Chamb.) Jtn. var. chorisianus
Common Name: Choris' popcornflower
Family:	Boraginaceae
Element Code:	PDBOR0V061
USDA Plants Symbol:	PLCHC
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:	G3T1Q
State Rank:	S1
Other Status:	BLM_S; SB_UCSC
CRPR Changes:
Add Date:	1984-01-01
Date Edited:	2022-06-08

Ecology and Life History

Lifeform: annual herb

Blooming Period: Mar-Jun

Elevation:
3 - 160 meters
10 - 525 feet

General Habitats:

Chaparral
Coastal prairie
Coastal scrub

Microhabitat Details:

Microhabitat:

Mesic

Notes

Notes: Taxonomic work needed; intergrades with var. hickmanii, and differences may be environmentally induced. Threatened by development, foot traffic, and non-native plants.
Threats:
Taxonomy:

Threat List Data from the CNDDB

THREAT LIST:
Threat List Total:	10
	Total EOs	% of EOs
EOs with Threat Listed:	17	40 %
Non-native plant impacts	12	28%
Other	8	19%
Foot traffic/trampling	2	4%
Grazing	1	2%
Recreational use (non-ORV)	1	2%
Road/trail construction/maint.	1	2%
Altered flood/tidal/hydrologic regime	1	2%
Development	1	2%
Disking	1	2%
Erosion/runoff	1	2%

Occurrence Data from the CNDDB

Element Occurrence Ranks:
Total Occurrences:					42
A	B	C	D	X	U
2	9	4	0	1	26

Occurrence Status:
Historical >20 Years	23
Recent <=20 Years	19

Presence:
Presumed Extant	41
Possibly Extirpated	0
Presumed Extirpated	1

Location

California Endemic:

California Island:

States: Name (Code)
California (CA)

California Counties and Islands: Name (Code)
Alameda (ALA)(?), Monterey (MNT), San Francisco (SFO), San Mateo (SMT), Santa Clara (SCL), Santa Cruz (SCR)

Quads: Name (Quad Code)
Ano Nuevo (3712213), Big Basin (3712222), Davenport (3712212), Felton (3712211), Franklin Point (3712223), Half Moon Bay (3712244), La Honda (3712233), Laurel (3712118), Mindego Hill (3712232), Montara Mountain (3712254), Moss Landing (3612177), Oakland West (3712273)*, Palo Alto (3712242), Pigeon Point (3712224), Salinas (3612166), San Francisco North (3712274)(?), San Francisco South (3712264), San Gregorio (3712234), San Mateo (3712253), Watsonville West (3612187), Woodside (3712243)

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