Taxon Report

Arctostaphylos densiflora M.S. Baker

Vine Hill manzanita

Print Report

Taxon Summary

Arctostaphylos densiflora, commonly known as Vine Hill manzanita, is a perennial evergreen shrub in the Ericaceae that is found only in California. It occurs within Chaparral, growing at elevations from 50 to 120 meters. Arctostaphylos densiflora is ranked 1B.1, Plants Rare, Threatened or Endangered in California and Elsewhere; Seriously threatened in California.

Classification


Scientific Name:	Arctostaphylos densiflora M.S. Baker
Common Name:	Vine Hill manzanita
Family:	Ericaceae
Element Code:	PDERI040C0
USDA Plants Symbol:	ARDE2
Synonyms/Other Names:

Ecology and Life History


Lifeform:	perennial evergreen shrub
Blooming Period: Feb-Apr	Feb-Apr
Elevation:	50-120 (165-395)
General Habitats:	Chaparral
Microhabitat:
Microhabitat Details:

Conservation Status


CA Rare Plant Rank:	1B.1
Global Rank:	G1
State Rank:	S1
State List:	CE
Fed List:	None
Other Status:	SB_CalBG/RSABG; SB_UCBG
CRPR Changes:

Occurrence Data from the CNDDB


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

Location


California Endemic: True
California Counties and Islands: Name (Code)
Sonoma (SON)
Quads: Name (Quad Code)
Sebastopol (3812247)

Threat List Data from the CNDDB


Threat List Total:	3
EOs with Threat Listed:	Total EOs	% of EOs
	2	100 %
Disease	2	100%
Road/trail construction/maint.	2	100%
Agriculture	1	50%

Notes



See Leaflets of Western Botany 1(4):31 (1932) for original description.
Threats:
Threatened by fungal infection.
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 17 March 2025].