Species Details

Sidalcea calycosa ssp. rhizomata

Point Reyes checkerbloom

Download Report Calflora eFlora CCH CalPhotos

Classification

Scientific Name: Sidalcea calycosa Jones ssp. rhizomata (Jeps.) Munz
Common Name: Point Reyes checkerbloom
Family:	Malvaceae
Element Code:	PDMAL11012
USDA Plants Symbol:	SICAR
Synonyms/Other Names:

Conservation Status

CA Rare Plant Rank:	1B.2
Fed List:	None
State List:	None
Global Rank:	G5T2
State Rank:	S2
Other Status:
CRPR Changes:
Add Date:	1994-01-01
Date Edited:	2022-12-06

Ecology and Life History

Lifeform: perennial rhizomatous herb

Blooming Period: Apr-Sep

Elevation:
3 - 75 meters
10 - 245 feet

General Habitats:

Marshes and swamps (freshwater, near coast)

Microhabitat Details:

Microhabitat:

Notes

Notes: Threatened by non-native plants, road maintenance, foot traffic, and pipeline construction. Possibly threatened by grazing. See Manual of the Flowering Plants of California, p. 629 (1925) by W.L. Jepson for original description.
Threats:
Taxonomy:

Threat List Data from the CNDDB

THREAT LIST:
Threat List Total:	9
	Total EOs	% of EOs
EOs with Threat Listed:	20	59 %
Grazing	13	38%
Other	10	29%
Road/trail construction/maint.	6	17%
Foot traffic/trampling	5	14%
Non-native plant impacts	3	8%
Development	2	5%
Altered flood/tidal/hydrologic regime	1	2%
Mining	1	2%
Recreational use (non-ORV)	1	2%

Occurrence Data from the CNDDB

Element Occurrence Ranks:
Total Occurrences:					34
A	B	C	D	X	U
1	17	6	1	0	9

Occurrence Status:
Historical >20 Years	20
Recent <=20 Years	14

Presence:
Presumed Extant	34
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)
Albion (3912327), Bolinas (3712286), Drakes Bay (3812218), Duncans Mills (3812341), Elk (3912326), Inverness (3812217), Petaluma (3812226), Petaluma River (3812225), San Rafael (3712285), 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