Viola primulifolia ssp. occidentalis

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Scientific Name: Viola primulifolia L. ssp. occidentalis (Gray) L.E. McKinney & R.J. Little
Common Name: western white bog violet
Family:	Violaceae
Element Code:	PDVIO040Y2
USDA Plants Symbol:
Synonyms/Other Names: Viola lanceolata L. ssp. occidentalis (Gray) Russell

Lifeform: perennial rhizomatous herb

Blooming Period: Apr-Sep

Elevation:
100 - 990 meters
330 - 3250 feet

General Habitats:

Microhabitat Details:

Microhabitat:

Notes: Threatened by mining, logging, road construction, and vehicles. Candidate for state listing in OR. See Botanical Gazette 11:255 (1886) for original description, and Phytologia 72(2):79 (1992) for revised nomenclature.
Threats:
Taxonomy:

THREAT LIST:
Threat List Total:	9
	Total EOs	% of EOs
EOs with Threat Listed:	9	47 %
Road/trail construction/maint.	3	15%
Other	2	10%
Altered flood/tidal/hydrologic regime	2	10%
Erosion/runoff	1	5%
Foot traffic/trampling	1	5%
Improper burning regime	1	5%
Logging	1	5%
ORV activity	1	5%
Vandalism/dumping/litter	1	5%

Occurrence Status:
Historical >20 Years	6
Recent <=20 Years	13

California Endemic:

California Island:

States: Name (Code)
California (CA), Oregon (OR)

California Counties and Islands: Name (Code)
Del Norte (DNT)

Quads: Name (Quad Code)
Gasquet (4112378), High Divide (4112481), High Plateau Mtn. (4112388), Hiouchi (4112471), Shelly Creek Ridge (4112387)

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

Presumed Extant

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CNPS Rare Plant Inventory