Taxon Report

Ribes thacherianum (Jeps.) Munz

Santa Cruz Island gooseberry

Print Report

Taxon Summary

Ribes thacherianum, commonly known as Santa Cruz Island gooseberry, is a perennial deciduous shrub in the Grossulariaceae that is found only in California. It occurs within Cismontane woodland, Closed-cone coniferous forest, and Riparian woodland, growing at elevations from 10 to 455 meters. Ribes thacherianum is ranked 1B.2, Plants Rare, Threatened or Endangered in California and Elsewhere; Moderately threatened in California.

Classification


Scientific Name:	Ribes thacherianum (Jeps.) Munz
Common Name:	Santa Cruz Island gooseberry
Family:	Grossulariaceae
Element Code:	PDGRO02109
USDA Plants Symbol:	RITH
Synonyms/Other Names:

Ecology and Life History


Lifeform:	perennial deciduous shrub
Blooming Period: Feb-Jun	Feb-Jun
Elevation:	10-455 (35-1495)
General Habitats:	Cismontane woodland, Closed-cone coniferous forest, Riparian woodland
Microhabitat:
Microhabitat Details:

Conservation Status


CA Rare Plant Rank:	1B.2
Global Rank:	G2
State Rank:	S2
State List:	None
Fed List:	None
Other Status:	SB_USDA
CRPR Changes:

Occurrence Data from the CNDDB


Total Occurrences:	12
Element Occurrence Ranks:
Excellent (A)	0
Good (B)	0
Fair (C)	0
Poor (D)	0
None (X)	0
Unknown (U)	12

Location


California Endemic: True
California Counties and Islands: Name (Code)
Santa Barbara (SBA)
Quads: Name (Quad Code)
Santa Cruz Island B (3311986), Santa Cruz Island C (3311985)

Threat List Data from the CNDDB


Threat List Total:	0
EOs with Threat Listed:	Total EOs	% of EOs
	0	%

Notes



Blooms intermittently throughout most of year. Possibly threatened by feral herbivores.
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 7 February 2025].