Species Details

Antirrhinum subcordatum

dimorphic snapdragon

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Classification

Scientific Name: Antirrhinum subcordatum Gray
Common Name: dimorphic snapdragon
Family:	Plantaginaceae
Element Code:	PDSCR2S070
USDA Plants Symbol:
Synonyms/Other Names:

Conservation Status

CA Rare Plant Rank:	4.3
Fed List:	None
State List:	None
Global Rank:	G3
State Rank:	S3
Other Status:	USFS_S
CRPR Changes:
Add Date:	1974-01-01
Date Edited:	2023-05-02

Ecology and Life History

Lifeform: annual herb

Blooming Period: Apr-Jul

Elevation:
185 - 800 meters
605 - 2625 feet

General Habitats:

Chaparral
Lower montane coniferous forest

Microhabitat Details:

Microhabitat:

Serpentine (sometimes)

Notes

Notes:
Threats:
Taxonomy:

Threat List Data from the CNDDB

THREAT LIST:
Threat List Total:	6
	Total EOs	% of EOs
EOs with Threat Listed:	19	39 %
Grazing	8	16%
Other	8	16%
Dam/Inundation	6	12%
Road/trail construction/maint.	2	4%
Recreational use (non-ORV)	1	2%
Logging	1	2%

Occurrence Data from the CNDDB

Element Occurrence Ranks:
Total Occurrences:					49
A	B	C	D	X	U
11	3	4	0	1	30

Occurrence Status:
Historical >20 Years	49
Recent <=20 Years	0

Presence:
Presumed Extant	48
Possibly Extirpated	1
Presumed Extirpated	0

Location

California Endemic:

California Island:

States: Name (Code)
California (CA)

California Counties and Islands: Name (Code)
Colusa (COL), Glenn (GLE), Lake (LAK), Tehama (TEH)

Quads: Name (Quad Code)
Chrome (3912265), Cold Fork (4012226), Fouts Springs (3912236), Gilmore Peak (3912235), Hall Ridge (3912276), Highland Springs (3812288), Lodoga (3912234), Lowrey (4012215), Mitchell Gulch (4012234), Newville (3912275), Paskenta (3912285), Raglin Ridge (4012216), Riley Ridge (3912286), Rosewood (4012235), St. John Mtn. (3912246), Stonyford (3912245), Tomhead Mtn. (4012227), Whispering Pines (3812276)

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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Selected References

Original Description:	Proceedings of the American Academy of Arts and Sciences 20:306 (1884)
Species Account:	Antirrhinum subcordatum profile for potential Species of Conservation Concern evaluation (2018)