Taxon Report

Arctostaphylos stanfordiana Parry ssp. raichei Knight

Raiche's manzanita

Print Report

Taxon Summary

Arctostaphylos stanfordiana ssp. raichei, commonly known as Raiche'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 (openings), growing at elevations from 450 to 1035 meters. Arctostaphylos stanfordiana ssp. raichei is ranked 1B.1, Plants Rare, Threatened or Endangered in California and Elsewhere; Seriously threatened in California.

Classification


Scientific Name:	Arctostaphylos stanfordiana Parry ssp. raichei Knight
Common Name:	Raiche's manzanita
Family:	Ericaceae
Element Code:	PDERI041G2
USDA Plants Symbol:	ARSTR
Synonyms/Other Names:

Ecology and Life History


Lifeform:	perennial evergreen shrub
Blooming Period: Feb-Apr	Feb-Apr
Elevation:	450-1035 (1475-3395)
General Habitats:	Chaparral, Lower montane coniferous forest
Microhabitat:	Rocky, Serpentine (often)
Microhabitat Details:

Conservation Status


CA Rare Plant Rank:	1B.1
Global Rank:	G3T2
State Rank:	S2
State List:	None
Fed List:	None
Other Status:	BLM_S; SB_CalBG/RSABG; SB_USDA
CRPR Changes:

Occurrence Data from the CNDDB


Total Occurrences:	13
Element Occurrence Ranks:
Excellent (A)	1
Good (B)	0
Fair (C)	0
Poor (D)	0
None (X)	0
Unknown (U)	12

Location


California Endemic: True
California Counties and Islands: Name (Code)
Lake (LAK), Mendocino (MEN)
Quads: Name (Quad Code)
Clearlake Highlands (3812286), Cloverdale (3812371), Cow Mountain (3912321), Elledge Peak (3912312), Highland Springs (3812288), Hopland (3812381), Kelseyville (3812287)?, Leggett (3912376), Noble Butte (3912386), Orrs Springs (3912323), Purdys Gardens (3912311), Ukiah (3912322), Whispering Pines (3812276), Yorkville (3812382)

Threat List Data from the CNDDB


Threat List Total:	3
EOs with Threat Listed:	Total EOs	% of EOs
	2	15 %
Mining	1	7%
ORV activity	1	7%
Road/trail construction/maint.	1	7%

Notes



Threatened by urbanization and vehicles. See Four Seasons 7(3):18 (1985) for original description.
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].