Taxon Details

Viola howellii

Howell's violet

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Taxon Summary:

Viola howellii, commonly known as Howell's violet, is a perennial herb in the Violaceae that is found in California and elsewhere. It occurs within North Coast coniferous forest, growing at elevations from 655 to 655 meters. Viola howellii is ranked 2B.2, Plants Rare, Threatened, or Endangered in California, But More Common Elsewhere; Moderately threatened in California.

Classification

Scientific Name: Viola howellii A. Gray
Common Name: Howell's violet
Family:	Violaceae
Element Code:	PDVIO040U0
USDA Plants Symbol:	VIHO
Synonyms/Other Names:
Name Status:	JEF, FNA, POWO, IPNI, Tropicos

Conservation Status

CA Rare Plant Rank:	2B.2
Fed List:	None
State List:	None
Global Rank:	G4
State Rank:	S1
Other Status:
CRPR Changes: added to 2.2 on 2010-03-01
Add Date:	2010-03-01
Date Edited:	2021-06-03

Ecology and Life History

Lifeform: perennial herb

Blooming Period: May-Jun

Elevation:
655 - 655 meters
2150 - 2150 feet

General Habitats:

North Coast coniferous forest

Microhabitat Details:

Microhabitat:

Notes

Notes: Known in California from only 1 occurrence. Possibly threatened by foot traffic and logging.
Threats:
Taxonomy:

Threat List Data from the CNDDB

THREAT LIST:
Threat List Total:	3
	Total EOs	% of EOs
EOs with Threat Listed:	1	100 %
Foot traffic/trampling	1	100%
Logging	1	100%
Other	1	100%

Occurrence Data from the CNDDB

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

Occurrence Status:
Historical >20 Years	0
Recent <=20 Years	1

Presence:
Presumed Extant	1
Possibly Extirpated	0
Presumed Extirpated	0

Location

California Endemic:

California Island:

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

California Counties and Islands: Name (Code)
Siskiyou (SIS)

Quads: Name (Quad Code)
Dutch Creek (4112381)

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