Taxon Details

Clarkia imbricata

Vine Hill clarkia

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Taxon Summary:

Clarkia imbricata, commonly known as Vine Hill clarkia, is a annual herb in the Onagraceae that is found only in California. It occurs within Chaparral, and Valley and foothill grassland, growing at elevations from 50 to 75 meters. Clarkia imbricata is ranked 1B.1, Plants Rare, Threatened or Endangered in California and Elsewhere; Seriously threatened in California.

Classification

Scientific Name: Clarkia imbricata Lewis & Lewis
Common Name: Vine Hill clarkia
Family:	Onagraceae
Element Code:	PDONA050K0
USDA Plants Symbol:	CLIM
Synonyms/Other Names:
Name Status:	JEF, FNA, POWO, IPNI, Tropicos

Conservation Status

CA Rare Plant Rank:	1B.1
Fed List:	FE (1997-10-22)
State List:	CE (1978-11-01)
Global Rank:	G1
State Rank:	S1
Other Status:	SB_CalBG/RSABG; SB_UCBG
CRPR Changes:
Add Date:	1974-01-01
Date Edited:	2021-11-05

Ecology and Life History

Lifeform: annual herb

Blooming Period: Jun-Aug

Elevation:
50 - 75 meters
165 - 245 feet

General Habitats:

Chaparral
Valley and foothill grassland

Microhabitat Details:

Microhabitat:

Acidic
Loam
Sandy

Notes

Notes: Known from only two extant occurrences, one of which is introduced; a third, natural occurrence has been extirpated. Threatened by development and road maintenance. See Madroño 12(2):38 (1953) for original description.
Threats:
Taxonomy:

Threat List Data from the CNDDB

THREAT LIST:
Threat List Total:	8
	Total EOs	% of EOs
EOs with Threat Listed:	2	100 %
Non-native plant impacts	2	100%
Other	2	100%
Agriculture	2	100%
Development	2	100%
Wood cutting or brush clearing	2	100%
Hybridization	1	50%
Over-collecting/poaching	1	50%
Road/trail construction/maint.	1	50%

Occurrence Data from the CNDDB

Element Occurrence Ranks:
Total Occurrences:					2
A	B	C	D	X	U
0	1	1	0	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)
Sonoma (SON)

Quads: Name (Quad Code)
Sebastopol (3812247)

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

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CNPS Rare Plant Inventory