Taxon Details

Clarkia jolonensis

Jolon clarkia

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Taxon Summary:

Clarkia jolonensis, commonly known as Jolon clarkia, is a annual herb in the Onagraceae that is found only in California. It occurs within Chaparral, Cismontane woodland, Coastal scrub, and Riparian woodland, growing at elevations from 20 to 660 meters. Clarkia jolonensis is ranked 1B.2, Plants Rare, Threatened or Endangered in California and Elsewhere; Moderately threatened in California.

Classification

Scientific Name: Clarkia jolonensis Parnell
Common Name: Jolon clarkia
Family:	Onagraceae
Element Code:	PDONA050L0
USDA Plants Symbol:	CLJO2
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:	G2
State Rank:	S2
Other Status:	SB_SBBG; USFS_S
CRPR Changes:
Add Date:	1980-01-01
Date Edited:	2021-05-26

Ecology and Life History

Lifeform: annual herb

Blooming Period: Apr-Jun

Elevation:
20 - 660 meters
65 - 2165 feet

General Habitats:

Chaparral
Cismontane woodland
Coastal scrub
Riparian woodland

Microhabitat Details:

Microhabitat:

Notes

Notes: Can be confused with C. lewisii. Threatened by grazing. Possibly threatened by foot traffic and non-native plants. See Madroño 20(6):322 (1970) for original description.
Threats:
Taxonomy:

Threat List Data from the CNDDB

THREAT LIST:
Threat List Total:	7
	Total EOs	% of EOs
EOs with Threat Listed:	7	33 %
Other	3	14%
Development	2	9%
Non-native plant impacts	2	9%
Dam/Inundation	1	4%
Erosion/runoff	1	4%
Foot traffic/trampling	1	4%
Road/trail construction/maint.	1	4%

Occurrence Data from the CNDDB

Element Occurrence Ranks:
Total Occurrences:					21
A	B	C	D	X	U
0	2	0	2	6	11

Occurrence Status:
Historical >20 Years	15
Recent <=20 Years	6

Presence:
Presumed Extant	15
Possibly Extirpated	3
Presumed Extirpated	3

Location

California Endemic:

California Island:

States: Name (Code)
California (CA)

California Counties and Islands: Name (Code)
Monterey (MNT)

Quads: Name (Quad Code)
Big Sur (3612137), Bryson (3512171), Chews Ridge (3612135), Cosio Knob (3612112), Espinosa Canyon (3612111), Hames Valley (3512088), Jolon (3512182), Monterey (3612158), North Chalone Peak (3612142), Partington Ridge (3612126), Pfeiffer Point (3612127), Seaside (3612157), Soberanes Point (3612148), Soledad (3612143), Sycamore Flat (3612134), Williams Hill (3512181)

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