Taxon Report

Coryphantha alversonii (J.M. Coult.) Orcutt

Alverson's foxtail cactus

Print Report

Taxon Summary

Coryphantha alversonii is a synonym of Escobaria alversonii (J.M. Coult.) N.P. Taylor .

Classification


Scientific Name:	Coryphantha alversonii (J.M. Coult.) Orcutt
Common Name:	Alverson's foxtail cactus
Family:
Element Code:	PDCAC0X060
USDA Plants Symbol:
Synonyms/Other Names:	Escobaria alversonii (J.M. Coult.) N.P. Taylor Escobaria vivipara (Nutt.) F. Buxb. var. alversonii (Coult.) D. Hunt

Ecology and Life History


Lifeform:
Blooming Period:
Elevation:	- (-)
General Habitats:
Microhabitat:
Microhabitat Details:

Conservation Status


CA Rare Plant Rank:
Global Rank:	G3
State Rank:	S3
State List:	None
Fed List:	None
Other Status:
CRPR Changes:

Occurrence Data from the CNDDB


Total Occurrences:	55
Element Occurrence Ranks:
Excellent (A)	5
Good (B)	5
Fair (C)	6
Poor (D)	0
None (X)	0
Unknown (U)	39

Location


California Endemic: False
California Counties and Islands: Name (Code)

Quads: Name (Quad Code)

Threat List Data from the CNDDB


Threat List Total:	6
EOs with Threat Listed:	Total EOs	% of EOs
	36	65 %
Road/trail construction/maint.	25	45%
Landfill	17	30%
Other	11	20%
Mining	10	18%
Military operations	3	5%
Development	1	1%

Notes




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 31 October 2025].