CNPS.ORG Inventory of Rare and Endangered Plants - 7th edition interface
v7-14nov 11-15-14
Status: record arctostaphylos_canescens_ssp._sonomensis - Mon, Nov. 24, 2014 09:43 ET c
Arctostaphylos canescens ssp. sonomensis
common nameSonoma canescent manzanita
CalPhotos image
more photos
© 2004 Dean Wm. Taylor  Follow image link for photo data.
life form evergreen shrub
CA Rare Plant Rank
List 1B.2
LIST 1B: Rare, threatened, or endangered in California and elsewhere.
     0.2: Fairly endangered in California
state rank
S2      ranking system key
global rank
G3G4T2   G3G4: Intermediate between G3 and G4
Where did the "RED" code go?
CA state listingNone  
federal listingNone  
where found
(12/2) v7 maps currently unavailable - use link below for v8 details and maps

Topographic quads (25):
Rutherford (500B) 3812244, Sonoma (500C) 3812234, Santa Rosa (501B) 3812246, Whispering Pines (533C) 3812276, Wilbur Springs (547C) 3912214, Bartlett Mountain (549A) 3912227, Cow Mountain (550A) 3912321, Purdys Gardens (550D) 3912311, Fouts Springs (564C) 3912236, Elk Mountain (565C) 3912238, Potato Hill (565D) 3912237, Willits (567A) 3912343, Plaskett Ridge (581B) 3912268, Hull Mountain (581C) 3912258, Sanhedrin Mountain (582D) 3912351, Mendocino Pass (597C) 3912278, Log Spring (597D) 3912277, Noble Butte (600B) 3912386, Leggett (600C) 3912376, Sims Mountain (652A) 4012365, Board Camp Mountain (652B) 4012366, Blake Mountain (652D) 4012355, Willow Creek (670B) 4012386, Grouse Mountain (670C) 4012376, Hennessy Peak (670D) 4012375
quad data info

Counties, states, regions:
Colusa (COL), Humboldt (HUM), Lake (LAK), Mendocino (MEN), Sonoma (SON), Tehama (TEH), Trinity (TRI)
counties map
CNDDB Quick Viewer
Web application for exploring the CNDDB elements reported at the quad level.
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A reminder: Species not recorded for a given area may nonetheless be present, especially where favorable conditions occur.
CNPS habitats•Chaparral (Chprl)
•Lower montane coniferous forest (LCFrs)/sometimes serpentinite
blooming period Jan-Jun  
elevation range180 - 1675 meters
Threatened by development and logging. See Leaflets of Western Botany 1:78 (1933) for original description, Four Seasons 7(3):42-46 (1985) for status update, and Madroņo 35(4):330-341 (1988) for revised nomenclature.
full nameArctostaphylos canescens Eastw. ssp. sonomensis (Eastw.) Wells
Version 8    INVENTORY VERSION 8 - Details for this taxon, including GIS and other links

Additional information:
standard acronym  ARCAS3 Element Code  PDERI04066
CNPS chapter link chapter content  North Coast database for this species
CalFlora species this taxon    CalFlora genus related taxa
Jepson Online Jepson Interchange  Jepson Manual and other resources
Google search
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Suggested citation: California Native Plant Society (CNPS). 2014. Inventory of Rare and Endangered Plants (online edition, v7-14nov). California Native Plant Society. Sacramento, CA. Accessed on Mon, Nov. 24, 2014 from

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