Taxon Report

Dudleya abramsii Rose ssp. bettinae (Hoov.) J. Bartel

Betty's dudleya

Print Report

Taxon Summary

Dudleya abramsii ssp. bettinae, commonly known as Betty's dudleya, is a perennial herb in the Crassulaceae that is found only in California. It occurs within Chaparral, Coastal scrub, and Valley and foothill grassland, growing at elevations from 20 to 180 meters. Dudleya abramsii ssp. bettinae is ranked 1B.2, Plants Rare, Threatened or Endangered in California and Elsewhere; Moderately threatened in California.

Classification


Scientific Name:	Dudleya abramsii Rose ssp. bettinae (Hoov.) J. Bartel
Common Name:	Betty's dudleya
Family:	Crassulaceae
Element Code:	PDCRA04011
USDA Plants Symbol:	DUABB
Synonyms/Other Names:	Dudleya bettinae Hoov.

Ecology and Life History


Lifeform:	perennial herb
Blooming Period: May-Jul	May-Jul
Elevation:	20-180 (65-590)
General Habitats:	Chaparral, Coastal scrub, Valley and foothill grassland
Microhabitat:	Rocky, Serpentine
Microhabitat Details:

Conservation Status


CA Rare Plant Rank:	1B.2
Global Rank:	G4T2
State Rank:	S2
State List:	None
Fed List:	None
Other Status:	SB_CalBG/RSABG
CRPR Changes:

Occurrence Data from the CNDDB


Total Occurrences:	14
Element Occurrence Ranks:
Excellent (A)	2
Good (B)	4
Fair (C)	1
Poor (D)	1
None (X)	0
Unknown (U)	6

Location


California Endemic: True
California Counties and Islands: Name (Code)
San Luis Obispo (SLO)
Quads: Name (Quad Code)
Cayucos (3512048), Morro Bay North (3512047), Morro Bay South (3512037), Pismo Beach (3512026), San Luis Obispo (3512036)

Threat List Data from the CNDDB


Threat List Total:	9
EOs with Threat Listed:	Total EOs	% of EOs
	5	36 %
Grazing	2	14%
Development	2	14%
Road/trail construction/maint.	2	14%
Feral pigs	1	7%
Foot traffic/trampling	1	7%
Improper burning regime	1	7%
Military operations	1	7%
Non-native plant impacts	1	7%
Recreational use (non-ORV)	1	7%

Notes



Known from fewer than ten occurrences. Possibly threatened by road construction. See Leaflets of Western Botany 10(11):186 (1965) for original description, and Phytologia 70(4):229-230 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 5 February 2025].