Taxon Report

Hulsea californica T. & G.

San Diego sunflower

Print Report

© 2015 Keir Morse

Classification


Scientific Name:	Hulsea californica T. & G.
Common Name:	San Diego sunflower
Family:	Asteraceae
Element Code:	PDAST4Z030
USDA Plants Symbol:	HUCA
Synonyms/Other Names:

Ecology and Life History


Lifeform:	perennial herb
Blooming Period: Apr-Jun	Apr-Jun
Elevation:	915-2915 (3000-9565)
General Habitats:	Chaparral, Lower montane coniferous forest, Upper montane coniferous forest
Microhabitat:	Burned areas, Openings
Microhabitat Details:

Conservation Status


CA Rare Plant Rank:	1B.3
Global Rank:	G3
State Rank:	S3
State List:	None
Fed List:	None
Other Status:	BLM_S; SB_CalBG/RSABG; SB_CRES
CRPR Changes:

Occurrence Data from the CNDDB


Total Occurrences:	70
Element Occurrence Ranks:
Excellent (A)	2
Good (B)	3
Fair (C)	6
Poor (D)	0
None (X)	0
Unknown (U)	59

Location


California Endemic: True
California Counties and Islands: Name (Code)
Riverside (RIV), San Diego (SDG)
Quads: Name (Quad Code)
Aguanga (3311647), Barrett Lake (3211666), Boucher Hill (3311638), Bucksnort Mtn. (3311645), Campo (3211654), Cuyamaca Peak (3211685), Descanso (3211675), Hot Springs Mtn. (3311635), Julian (3311615), Live Oak Springs (3211663), Monument Peak (3211684), Morena Reservoir (3211665), Mount Laguna (3211674), Palomar Observatory (3311637), Ranchita (3311625), Santa Ysabel (3311616), Sombrero Peak (3211673), Tecate (3211656), Vail Lake (3311648), Viejas Mountain (3211676), Warner Springs (3311636), Warners Ranch (3311626)

Threat List Data from the CNDDB


Threat List Total:	6
EOs with Threat Listed:	Total EOs	% of EOs
	8	11 %
Development	2	2%
Non-native plant impacts	2	2%
Other	2	2%
Road/trail construction/maint.	2	2%
ORV activity	1	1%
Foot traffic/trampling	1	1%

Notes



Threatened by non-native plants. Possibly threatened by fire suppression, recreational activities, and vehicles. See Report of the Pacific Railroad Expedition 6:77 (1858) for original description, and Brittonia 27(3):228-244 (1975) for taxonomic treatment.
Threats:

Taxonomy:

Selected References

Citation California Native Plant Society, Rare Plant Program. 2025. Rare Plant Inventory (online edition, v9.5.1). Website https://www.rareplants.cnps.org [accessed 8 January 2025].