Taxon Report

Veratrum insolitum Jeps.

Siskiyou false-hellebore

Print Report

Taxon Summary

Veratrum insolitum, commonly known as Siskiyou false-hellebore, is a perennial herb in the Melanthiaceae that is found in California and elsewhere. It occurs within Chaparral, and Lower montane coniferous forest, growing at elevations from 45 to 1635 meters. Veratrum insolitum is ranked 4.3, Plants of Limited Distribution, A Watch List; Not very threatened in California.

Classification


Scientific Name:	Veratrum insolitum Jeps.
Common Name:	Siskiyou false-hellebore
Family:	Melanthiaceae
Element Code:	PMLIL25040
USDA Plants Symbol:	VEIN
Synonyms/Other Names:

Ecology and Life History


Lifeform:	perennial herb
Blooming Period: Jun-Aug	Jun-Aug
Elevation:	45-1635 (150-5365)
General Habitats:	Chaparral, Lower montane coniferous forest
Microhabitat:	Clay
Microhabitat Details:

Conservation Status


CA Rare Plant Rank:	4.3
Global Rank:	G3
State Rank:	S4
State List:	None
Fed List:	None
Other Status:
CRPR Changes:

Occurrence Data from the CNDDB


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

Location


California Endemic: False
California Counties and Islands: Name (Code)
Del Norte (DNT), Humboldt (HUM), Shasta (SHA), Siskiyou (SIS), Trinity (TRI)
Quads: Name (Quad Code)
Blue Creek Mtn. (4112347), Carrville (4112216), Covington Mill (4012287), Dinsmore (4012345), Figurehead Mtn. (4112383), Fish Lake (4112336), Forest Glen (4012333), High Divide (4112481), Hiouchi (4112471), Johnsons (4112337), Kangaroo Mtn. (4112382), Klamath Glen (4112358), Polar Bear Mtn. (4112385), Tangle Blue Lake (4112226), Tombstone Mtn. (4112213), Trinity Center (4012286), Wildwood (4012341)

Threat List Data from the CNDDB


Threat List Total:	0
EOs with Threat Listed:	Total EOs	% of EOs
	0	0 %

Notes



State-listed as Sensitive in WA.
Threats:

Taxonomy:

Selected References

Citation California Native Plant Society, Rare Plant Program. 2025. Rare Plant Inventory (online edition, v9.5.1). Website https://www.rareplants.cnps.org [accessed 10 March 2025].