Taxon Report

Grindelia hirsutula H. & A. var. maritima (Greene) M.A. Lane

San Francisco gumplant

Print Report

Taxon Summary

Grindelia hirsutula var. maritima, commonly known as San Francisco gumplant, is a perennial herb in the Asteraceae that is found only in California. It occurs within Coastal bluff scrub, Coastal scrub, and Valley and foothill grassland, growing at elevations from 15 to 400 meters. Grindelia hirsutula var. maritima is ranked 3.2, Plants About Which We Need More Information, A Review List; Moderately threatened in California.

Classification


Scientific Name:	Grindelia hirsutula H. & A. var. maritima (Greene) M.A. Lane
Common Name:	San Francisco gumplant
Family:	Asteraceae
Element Code:	PDAST470D3
USDA Plants Symbol:	GRHIM
Synonyms/Other Names:	Grindelia maritima (Greene) Steyerm.

Ecology and Life History


Lifeform:	perennial herb
Blooming Period: Jun-Sep	Jun-Sep
Elevation:	15-400 (50-1310)
General Habitats:	Coastal bluff scrub, Coastal scrub, Valley and foothill grassland
Microhabitat:	Sandy (sometimes), Serpentine (sometimes)
Microhabitat Details:

Conservation Status


CA Rare Plant Rank:	3.2
Global Rank:	G5T1Q
State Rank:	S1
State List:	None
Fed List:	None
Other Status:	SB_UCSC
CRPR Changes:	changed from 1B.2 to 3.2 on 2011-09-20

Occurrence Data from the CNDDB


Total Occurrences:	15
Element Occurrence Ranks:
Excellent (A)	0
Good (B)	4
Fair (C)	2
Poor (D)	1
None (X)	1
Unknown (U)	7

Location


California Endemic: True
California Counties and Islands: Name (Code)
Marin (MRN), San Francisco (SFO), San Luis Obispo (SLO), San Mateo (SMT), Santa Clara (SCL)
Quads: Name (Quad Code)
Castle Rock Ridge (3712221), Drakes Bay (3812218), Los Gatos (3712128), Montara Mountain (3712254), Pigeon Point (3712224), Point Bonita (3712275)?, San Francisco North (3712274), San Francisco South (3712264), San Geronimo (3812216), San Luis Obispo (3512036), Tomales (3812228)

Threat List Data from the CNDDB


Threat List Total:	5
EOs with Threat Listed:	Total EOs	% of EOs
	11	73 %
Non-native plant impacts	7	46%
Other	2	13%
Development	2	13%
Foot traffic/trampling	2	13%
Road/trail construction/maint.	1	6%

Notes



Previously on List 1B. Plants from MNT and SCR counties need verification. Threatened by coastal development and non-native plants. Can be difficult to identify; many herbarium specimens need to be checked for correct identification. May be a hybrid between G. hirsutula var. hirsutula and G. stricta var. platyphylla or G. stricta var. angustifolia; needs further study. Not in TJM 2. See Pittonia 2:289 (1892) for original description and Novon 2(3):215-217 (1992) for revised nomenclature.
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 30 January 2025].