Taxon Details

Dudleya blochmaniae ssp. insularis

Santa Rosa Island dudleya

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Taxon Summary:

Dudleya blochmaniae ssp. insularis, commonly known as Santa Rosa Island dudleya, is a perennial herb in the Crassulaceae that is found only in California. It occurs within Coastal bluff scrub, growing at elevations from 3 to 10 meters. Dudleya blochmaniae ssp. insularis is ranked 1B.1, Plants Rare, Threatened or Endangered in California and Elsewhere; Seriously threatened in California.

Classification

Scientific Name: Dudleya blochmaniae (Eastw.) Moran ssp. insularis Moran
Common Name: Santa Rosa Island dudleya
Family:	Crassulaceae
Element Code:	PDCRA04052
USDA Plants Symbol:	DUBLI
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:	G2T1
State Rank:	S1
Other Status:
CRPR Changes:
Add Date:	1974-01-01
Date Edited:	2023-04-04

Ecology and Life History

Lifeform: perennial herb

Blooming Period: Mar-Apr

Elevation:
3 - 10 meters
10 - 35 feet

General Habitats:

Coastal bluff scrub

Microhabitat Details:

Microhabitat:

Notes

Notes: Known from only one occurrence near Old Ranch Pt. Population has been fenced as of 1996; still possibly threatened by cattle trampling, grazing by feral herbivores, non-native plants and horticultural collecting.
Threats:
Taxonomy:

Threat List Data from the CNDDB

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

Occurrence Data from the CNDDB

Element Occurrence Ranks:
Total Occurrences:					1
A	B	C	D	X	U
0	0	0	0	0	1

Occurrence Status:
Historical >20 Years	1
Recent <=20 Years	0

Presence:
Presumed Extant	1
Possibly Extirpated	0
Presumed Extirpated	0

Location

California Endemic:

California Island:

States: Name (Code)
California (CA)

California Counties and Islands: Name (Code)
Santa Barbara (SBA)

Quads: Name (Quad Code)
Santa Rosa Island East (3311988)

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