Taxon Details

Sidalcea stipularis

Scadden Flat checkerbloom

View Report Copy Link Calflora eFlora CCH CalPhotos iNaturalist

Taxon Summary:

Sidalcea stipularis, commonly known as Scadden Flat checkerbloom, is a perennial rhizomatous herb in the Malvaceae that is found only in California. It occurs within Marshes and swamps, growing at elevations from 700 to 730 meters. Sidalcea stipularis is ranked 1B.1, Plants Rare, Threatened or Endangered in California and Elsewhere; Seriously threatened in California.

Classification

Scientific Name: Sidalcea stipularis J.T. Howell & G. True
Common Name: Scadden Flat checkerbloom
Family:	Malvaceae
Element Code:	PDMAL110R0
USDA Plants Symbol:	SIST3
Synonyms/Other Names:
Name Status:	JEF, FNA, POWO, IPNI, Tropicos

Conservation Status

CA Rare Plant Rank:	1B.1
Fed List:	None
State List:	CE (1982-01-01)
Global Rank:	G1
State Rank:	S1
Other Status:	SB_CalBG/RSABG
CRPR Changes:
Add Date:	1980-01-01
Date Edited:	2021-05-26

Ecology and Life History

Lifeform: perennial rhizomatous herb

Blooming Period: Jul-Aug

Elevation:
700 - 730 meters
2295 - 2395 feet

General Habitats:

Marshes and swamps (montane freshwater)

Microhabitat Details:

Microhabitat:

Notes

Notes: Known from only two occurrences near Grass Valley. One occurrence voluntarily protected by landowner. Threatened by altered hydrology, grazing, mowing, and non-native plants. See Four Seasons 4(4):20-22 (1974) for original description.
Threats:
Taxonomy:

Threat List Data from the CNDDB

THREAT LIST:
Threat List Total:	6
	Total EOs	% of EOs
EOs with Threat Listed:	2	100 %
Altered flood/tidal/hydrologic regime	2	100%
Non-native plant impacts	2	100%
Other	2	100%
Road/trail construction/maint.	2	100%
Biocides	1	50%
Grazing	1	50%

Occurrence Data from the CNDDB

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

Occurrence Status:
Historical >20 Years	1
Recent <=20 Years	1

Presence:
Presumed Extant	2
Possibly Extirpated	0
Presumed Extirpated	0

Location

California Endemic:

California Island:

States: Name (Code)
California (CA)

California Counties and Islands: Name (Code)
Nevada (NEV)

Quads: Name (Quad Code)
Chicago Park (3912028), Grass Valley (3912121)

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