Taxon Report

Viola howellii A. Gray

Howell's violet

Print Report

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:

Ecology and Life History


Lifeform:	perennial herb
Blooming Period: May-Jun	May-Jun
Elevation:	655-655 (2150-2150)
General Habitats:	North Coast coniferous forest
Microhabitat:
Microhabitat Details:

Conservation Status


CA Rare Plant Rank:	2B.2
Global Rank:	G4
State Rank:	S1
State List:	None
Fed List:	None
Other Status:
CRPR Changes:	changed from 2.2 to 2B.2 on 2013-06-12 added to 2.2 on 2010-03-01

Occurrence Data from the CNDDB


Total Occurrences:	1
Element Occurrence Ranks:
Excellent (A)	0
Good (B)	0
Fair (C)	0
Poor (D)	0
None (X)	0
Unknown (U)	1

Location


California Endemic: False
California Counties and Islands: Name (Code)
Siskiyou (SIS)
Quads: Name (Quad Code)
Dutch Creek (4112381)

Threat List Data from the CNDDB


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

Notes



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

Taxonomy:

Selected References

CRPR List Addition on 2010-03-01

Citation California Native Plant Society, Rare Plant Program. 2025. Rare Plant Inventory (online edition, v9.5.1). Website https://www.rareplants.cnps.org [accessed 27 October 2025].