CNPS.ORG Inventory of Rare and Endangered Plants - 7th edition interface
v7-18mar 3-19-18
Status: record sidalcea_oregana_ssp._valida - Sat, Dec. 4, 2021, 20:46 ET b
Sidalcea oregana ssp. valida
common nameKenwood Marsh checkerbloom
CalPhotos image
more photos
© 2010 US Fish & Wildlife Service  Follow image link for photo data.
life form rhizomatous herb
CA Rare Plant Rank
List 1B.1
LIST 1B: Rare, threatened, or endangered in California and elsewhere.
     0.1: Seriously endangered in California
state rank
S1      ranking system key
global rank
G5T1      ranking system key
Where did the "RED" code go?
CA state listingEndangered  01/82
federal listingEndangered  10/22/97
where found
MAPS - Use v8 link below.

Topographic quads (2):
Kenwood (501A) 3812245, Mount St. Helena (517B) 3812266
quad data info

Counties, states, regions:
Sonoma (SON)
A reminder: Species not recorded for a given area may nonetheless be present, especially where favorable conditions occur.
CNPS habitats•Marshes and swamps (MshSw)(freshwater)
blooming period Jun-Sep  
elevation range115 - 150 meters
Known from only two occurrences. Threatened by grazing and hydrological alteration, and possibly by competition with native and non-native plants. See Pittonia 3:157-158 (1897) for original description, and University of Washington Publications in Biology 18:56-58 (1957) for revised nomenclature.
full nameSidalcea oregana (Nutt.) Gray ssp. valida (Greene) C.L. Hitchc.
Version 8    INVENTORY VERSION 8 interface for this taxon, including GIS and more links

Additional information:
standard acronym  SIORV Element Code  PDMAL110K5
CalFlora species this taxon    CalFlora genus related taxa
Jepson Online Jepson Interchange  Jepson Manual and other resources
Google search
search Google CNPS website    search Google entire web

Suggested citation: California Native Plant Society (CNPS). 2018. Inventory of Rare and Endangered Plants (online edition, v7-18mar). California Native Plant Society. Sacramento, CA. Accessed on Sat, Dec. 4, 2021 from

pick and add to Plant Pressexplain the meaning of the fieldsFIRSTPREVIOUSNEXTLASTCNPS.ORGQuestions and CommentsHOMELOGIN (you are guest anonymous)   Web Oriented Database Home