Taxon Details

Sidalcea malviflora ssp. purpurea

purple-stemmed checkerbloom

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Taxon Summary:

Sidalcea malviflora ssp. purpurea, commonly known as purple-stemmed checkerbloom, is a perennial rhizomatous herb in the Malvaceae that is found only in California. It occurs within Broadleafed upland forest, and Coastal prairie, growing at elevations from 15 to 85 meters. Sidalcea malviflora ssp. purpurea is ranked 1B.2, Plants Rare, Threatened or Endangered in California and Elsewhere; Moderately threatened in California.

Classification

Scientific Name: Sidalcea malviflora (DC.) Benth. ssp. purpurea Hitchc.
Common Name: purple-stemmed checkerbloom
Family:	Malvaceae
Element Code:	PDMAL110FL
USDA Plants Symbol:	SIMAP2
Synonyms/Other Names:
Name Status:	JEF, FNA, POWO, IPNI, Tropicos

Conservation Status

CA Rare Plant Rank:	1B.2
Fed List:	None
State List:	None
Global Rank:	G4G5T1
State Rank:	S1
Other Status:	BLM_S
CRPR Changes:
Add Date:	2001-01-01
Date Edited:	2025-03-05

Ecology and Life History

Lifeform: perennial rhizomatous herb

Blooming Period: May-Jun

Elevation:
15 - 85 meters
50 - 280 feet

General Habitats:

Broadleafed upland forest
Coastal prairie

Microhabitat Details:

Microhabitat:

Notes

Notes: Does plant occur in MRN Co.? Collection from 485C is intermediate with ssp. malviflora. Need quads for SMT Co. See University of Washington Publications in Biology 18:23 (1957) for original description.
Threats: Threatened by development and non-native plants.
Taxonomy:

Threat List Data from the CNDDB

THREAT LIST:
Threat List Total:	6
	Total EOs	% of EOs
EOs with Threat Listed:	8	42 %
Development	4	21%
Foot traffic/trampling	4	21%
Road/trail construction/maint.	4	21%
Non-native plant impacts	3	15%
Recreational use (non-ORV)	2	10%
Grazing	1	5%

Occurrence Data from the CNDDB

Element Occurrence Ranks:
Total Occurrences:					19
A	B	C	D	X	U
1	2	3	0	0	13

Occurrence Status:
Historical >20 Years	17
Recent <=20 Years	2

Presence:
Presumed Extant	19
Possibly Extirpated	0
Presumed Extirpated	0

Location

California Endemic:

California Island:

States: Name (Code)
California (CA)

California Counties and Islands: Name (Code)
Marin (MRN)?, Mendocino (MEN), Sonoma (SON)

Quads: Name (Quad Code)
Bodega Head (3812331), Cazadero (3812351), Drakes Bay (3812218)?, Duncans Mills (3812341), Fort Bragg (3912347), Fort Ross (3812352), Gualala (3812375), Inglenook (3912357), Mallo Pass Creek (3912316), Plantation (3812353), Point Arena (3812386), Saunders Reef (3812376), Stewarts Point (3812364)?, Tomales (3812228), Valley Ford (3812238)

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

Click on quad for name. Hold Shift Key to use mouse scroll wheel

CNPS Rare Plant Inventory