Taxon Report

Dudleya virens (Rose) Moran ssp. hassei (Rose) Moran

Catalina Island dudleya

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Taxon Summary

Dudleya virens ssp. hassei, commonly known as Catalina Island dudleya, is a perennial herb in the Crassulaceae that is found only in California. It occurs within Coastal bluff scrub, and Coastal scrub, growing at elevations from 0 to 400 meters. Dudleya virens ssp. hassei is ranked 1B.2, Plants Rare, Threatened or Endangered in California and Elsewhere; Moderately threatened in California.

Classification


Scientific Name:	Dudleya virens (Rose) Moran ssp. hassei (Rose) Moran
Common Name:	Catalina Island dudleya
Family:	Crassulaceae
Element Code:	PDCRA040S1
USDA Plants Symbol:	DUVIH
Synonyms/Other Names:

Ecology and Life History


Lifeform:	perennial herb
Blooming Period: Mar-Jun	Mar-Jun
Elevation:	0-400 (0-1310)
General Habitats:	Coastal bluff scrub, Coastal scrub
Microhabitat:	Rocky
Microhabitat Details:

Conservation Status


CA Rare Plant Rank:	1B.2
Global Rank:	G3?T2
State Rank:	S2
State List:	None
Fed List:	None
Other Status:	SB_CalBG/RSABG
CRPR Changes:	added to 1B.2 on 2011-03-08

Occurrence Data from the CNDDB


Total Occurrences:	10
Element Occurrence Ranks:
Excellent (A)	0
Good (B)	0
Fair (C)	0
Poor (D)	0
None (X)	0
Unknown (U)	10

Location


California Endemic: True
California Counties and Islands: Name (Code)
Los Angeles (LAX)
Quads: Name (Quad Code)
Santa Catalina East (3311833), Santa Catalina North (3311844), Santa Catalina South (3311834), Santa Catalina West (3311845)

Threat List Data from the CNDDB


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

Notes



Threatened by development and habitat fragmentation. Possibly threatened by feral herbivores. Suspected to hybridize with D. virens ssp. insularis. See D. hassei in TJM (1993). See Bulletin of the New York Botanical Garden 3(9):35 (1903) for original description, and Haseltonia 3:2 (1995) for revised nomenclature.
Threats:

Taxonomy:

Selected References

CRPR List Addition on 2011-03-08

Citation California Native Plant Society, Rare Plant Program. 2025. Rare Plant Inventory (online edition, v9.5.1). Website https://www.rareplants.cnps.org [accessed 27 January 2025].