Taxon Details

Corethrogyne filaginifolia var. linifolia

Del Mar Mesa sand aster

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Taxon Summary:

Corethrogyne filaginifolia var. linifolia, commonly known as Del Mar Mesa sand aster, is a perennial herb in the Asteraceae that is found only in California. It occurs within Chaparral (maritime, openings), Coastal bluff scrub, and Coastal scrub, growing at elevations from 5 to 150 meters. Corethrogyne filaginifolia var. linifolia is ranked 1B.1, Plants Rare, Threatened or Endangered in California and Elsewhere; Seriously threatened in California.

Classification

Scientific Name: Corethrogyne filaginifolia (H. & A.) Nutt. var. linifolia Hall
Common Name: Del Mar Mesa sand aster
Family:	Asteraceae
Element Code:	PDAST2M027
USDA Plants Symbol:
Synonyms/Other Names:
Name Status:	JEF, FNA, POWO, IPNI, Tropicos

Conservation Status

CA Rare Plant Rank:	1B.1
Fed List:	None
State List:	None
Global Rank:	G4T1Q
State Rank:	S1
Other Status:	SB_CRES
CRPR Changes:
Add Date:	1980-01-01
Date Edited:	2021-11-05

Ecology and Life History

Lifeform: perennial herb

Blooming Period: May-Sep

Elevation:
5 - 150 meters
15 - 490 feet

General Habitats:

Coastal bluff scrub
Chaparral (maritime, openings)
Coastal scrub

Microhabitat Details:

Microhabitat:

Sandy

Notes

Notes: Threatened by development, trampling, non-native plants, and road maintenance. A synonym of Lessingia filaginifolia var. filaginifolia in The Jepson Manual; additional taxonomic work ongoing as of 1999.
Threats:
Taxonomy:

Threat List Data from the CNDDB

THREAT LIST:
Threat List Total:	6
	Total EOs	% of EOs
EOs with Threat Listed:	27	63 %
Development	21	48%
Road/trail construction/maint.	10	23%
Foot traffic/trampling	3	6%
Non-native plant impacts	3	6%
Other	1	2%
Recreational use (non-ORV)	1	2%

Occurrence Data from the CNDDB

Element Occurrence Ranks:
Total Occurrences:					43
A	B	C	D	X	U
2	6	3	3	3	26

Occurrence Status:
Historical >20 Years	29
Recent <=20 Years	14

Presence:
Presumed Extant	40
Possibly Extirpated	2
Presumed Extirpated	1

Location

California Endemic:

California Island:

States: Name (Code)
California (CA)

California Counties and Islands: Name (Code)
San Diego (SDG)

Quads: Name (Quad Code)
Del Mar (3211782), Encinitas (3311713), Rancho Santa Fe (3311712), San Luis Rey (3311723)

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