Taxon Details

Collinsia corymbosa

round-headed collinsia

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Taxon Summary:

Collinsia corymbosa, commonly known as round-headed collinsia, is a annual herb in the Plantaginaceae that is found only in California. It occurs within Coastal dunes, growing at elevations from 0 to 20 meters. Collinsia corymbosa is ranked 1B.2, Plants Rare, Threatened or Endangered in California and Elsewhere; Moderately threatened in California.

Classification

Scientific Name: Collinsia corymbosa Herder
Common Name: round-headed collinsia
Family:	Plantaginaceae
Element Code:	PDSCR0H060
USDA Plants Symbol:	COCO2
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:	G1
State Rank:	S1
Other Status:	SB_CalBG/RSABG
CRPR Changes:
Add Date:	1994-01-01
Date Edited:	2025-10-29

Ecology and Life History

Lifeform: annual herb

Blooming Period: Apr-Jun

Elevation:
0 - 20 meters
0 - 65 feet

General Habitats:

Coastal dunes

Microhabitat Details:

Microhabitat:

Notes

Notes: Scattered distribution. Need quads for HUM Co. and for "Russian colony" (SON Co.). May intergrade with C. bartsiifolia var. bartsiifolia. Possibly threatened by foot traffic.
Threats:
Taxonomy:

Threat List Data from the CNDDB

THREAT LIST:
Threat List Total:	4
	Total EOs	% of EOs
EOs with Threat Listed:	5	38 %
Development	4	30%
Foot traffic/trampling	1	7%
Non-native plant impacts	1	7%
ORV activity	1	7%

Occurrence Data from the CNDDB

Element Occurrence Ranks:
Total Occurrences:					13
A	B	C	D	X	U
0	1	0	0	2	10

Occurrence Status:
Historical >20 Years	11
Recent <=20 Years	2

Presence:
Presumed Extant	11
Possibly Extirpated	0
Presumed Extirpated	2

Location

California Endemic:

California Island:

States: Name (Code)
California (CA)

California Counties and Islands: Name (Code)
Humboldt (HUM), Marin (MRN)?, Mendocino (MEN), San Francisco (SFO)*, San Mateo (SMT), Santa Clara (SCL)

Quads: Name (Quad Code)
Bolinas (3712286), Eureka (4012472), Fort Bragg (3912347), Inglenook (3912357), Palo Alto (3712242), San Francisco North (3712274)*, San Francisco South (3712264)

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