Taxon Report

Arctostaphylos malloryi (W. Knight & Gankin) P.V. Wells

Mallory's manzanita

Print Report

Taxon Summary

Arctostaphylos malloryi, commonly known as Mallory's manzanita, is a perennial evergreen shrub in the Ericaceae that is found only in California. It occurs within Chaparral, and Lower montane coniferous forest, growing at elevations from 765 to 1280 meters. Arctostaphylos malloryi is ranked 4.3, Plants of Limited Distribution, A Watch List; Not very threatened in California.

Classification


Scientific Name:	Arctostaphylos malloryi (W. Knight & Gankin) P.V. Wells
Common Name:	Mallory's manzanita
Family:	Ericaceae
Element Code:	PDERI042V0
USDA Plants Symbol:	ARMA31
Synonyms/Other Names:	Arctostaphylos canescens Eastw. ssp. malloryi Knight & Gankin

Ecology and Life History


Lifeform:	perennial evergreen shrub
Blooming Period: Apr-Jul	Apr-Jul
Elevation:	765-1280 (2510-4200)
General Habitats:	Chaparral, Lower montane coniferous forest
Microhabitat:	Volcanic
Microhabitat Details:

Conservation Status


CA Rare Plant Rank:	4.3
Global Rank:	G3
State Rank:	S3
State List:	None
Fed List:	None
Other Status:	SB_UCSC
CRPR Changes:

Occurrence Data from the CNDDB


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

Location


California Endemic: True
California Counties and Islands: Name (Code)
Colusa (COL), Shasta (SHA), Trinity (TRI)
Quads: Name (Quad Code)
Chanchelulla Peak (4012248), Dubakella Mtn. (4012342), Fouts Springs (3912236), Montgomery Creek (4012178), Whiskeytown (4012265)

Threat List Data from the CNDDB


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

Notes



To be expected in GLE and TEH counties. See Four Seasons 6(4):23 (1983) for original description and 9(2):54-59 (1992) for revised nomenclature.
Threats:
Potentially threatened by road construction.
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 1 November 2025].