Species Details

Arctostaphylos rainbowensis

Rainbow manzanita

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Species Description:

Arctostaphylos rainbowensis, commonly known as Rainbow manzanita, is a perennial evergreen shrub in the Ericaceae that is found only in California. It occurs within Chaparral, growing at elevations from 205 to 670 meters. Arctostaphylos rainbowensis is ranked 1B.1, Plants Rare, Threatened or Endangered in California and Elsewhere; Seriously threatened in California.

Classification

Scientific Name: Arctostaphylos rainbowensis J. Keeley & Massihi
Common Name: Rainbow manzanita
Family:	Ericaceae
Element Code:	PDERI042T0
USDA Plants Symbol:	ARRA7
Synonyms/Other Names:
Name Status:	JEP, FNA, POWO, IPNI, Tropicos

Conservation Status

CA Rare Plant Rank:	1B.1
Fed List:	None
State List:	None
Global Rank:	G2
State Rank:	S2
Other Status:	BLM_S; SB_CRES; USFS_S
CRPR Changes:
Add Date:	1994-01-01
Date Edited:	2022-12-06

Ecology and Life History

Lifeform: perennial evergreen shrub

Blooming Period: Dec-Mar

Elevation:
205 - 670 meters
675 - 2200 feet

General Habitats:

Chaparral

Microhabitat Details:

Microhabitat:

Notes

Notes: Previously called A. peninsularis ssp. peninsularis or considered to be a hybrid between A. glandulosa and A. glauca. Threatened by development and agricultural conversion. Not in The Jepson Manual. See Madroño 41(1):2 (1994) for original description.
Threats:
Taxonomy:

Threat List Data from the CNDDB

THREAT LIST:
Threat List Total:	10
	Total EOs	% of EOs
EOs with Threat Listed:	32	36 %
Development	26	29%
Agriculture	10	11%
Improper burning regime	4	4%
Non-native plant impacts	4	4%
Other	4	4%
Recreational use (non-ORV)	4	4%
Road/trail construction/maint.	2	2%
ORV activity	1	1%
Military operations	1	1%
Mining	1	1%

Occurrence Data from the CNDDB

Element Occurrence Ranks:
Total Occurrences:					89
A	B	C	D	X	U
7	7	6	3	0	66

Occurrence Status:
Historical >20 Years	43
Recent <=20 Years	46

Presence:
Presumed Extant	89
Possibly Extirpated	0
Presumed Extirpated	0

Location

California Endemic:

California Island:

States: Name (Code)
California (CA)

California Counties and Islands: Name (Code)
Riverside (RIV), San Diego (SDG)

Quads: Name (Quad Code)
Fallbrook (3311743), Margarita Peak (3311744)?, Morro Hill (3311733), Murrieta (3311752), Pala (3311731), Pechanga (3311741), Sitton Peak (3311754), Temecula (3311742), Valley Center (3311721), Wildomar (3311753)

Notes:

Definitions of codes following a county and/or quad:
*		Presumed extirpated
(?)		Occurrence confirmed, but possibly extirpated
Quad and county data is imported from the CNDDB. Species may be present in other areas where conditions are favorable. These data should NOT be substituted for pre-project review or for on-site surveys.

Regional Map

Map

Presumed Extant

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CNPS Rare Plant Inventory