Taxon Details

Epilobium rigidum

Siskiyou Mountains willowherb

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Taxon Summary:

Epilobium rigidum, commonly known as Siskiyou Mountains willowherb, is a perennial herb in the Onagraceae that is found in California and elsewhere. It occurs within Lower montane coniferous forest, growing at elevations from 150 to 1200 meters. Epilobium rigidum is ranked 4.3, Plants of Limited Distribution, A Watch List; Not very threatened in California.

Classification

Scientific Name: Epilobium rigidum Hausskn.
Common Name: Siskiyou Mountains willowherb
Family:	Onagraceae
Element Code:	PDONA060V0
USDA Plants Symbol:	EPRI
Synonyms/Other Names:
Name Status:	JEF, FNA, POWO, IPNI, Tropicos

Conservation Status

CA Rare Plant Rank:	4.3
Fed List:	None
State List:	None
Global Rank:	G3G4
State Rank:	S3
Other Status:	SB_UCSC
CRPR Changes:
Add Date:	1974-01-01
Date Edited:	2022-12-06

Ecology and Life History

Lifeform: perennial herb

Blooming Period: Jul-Aug

Elevation:
150 - 1200 meters
490 - 3935 feet

General Habitats:

Lower montane coniferous forest (serpentinite)

Microhabitat Details:

Microhabitat:

Notes

Notes: On watch list in OR.
Threats:
Taxonomy:

Threat List Data from the CNDDB

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

Occurrence Data from the CNDDB

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

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

Presence:
Presumed Extant	0
Possibly Extirpated	0
Presumed Extirpated	0

Location

California Endemic:

California Island:

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

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

Quads: Name (Quad Code)
Gasquet (4112378), High Divide (4112481), High Plateau Mtn. (4112388), Hiouchi (4112471), Hurdygurdy Butte (4112377), Prescott Mtn. (4112366), Preston Peak (4112375), Shelly Creek Ridge (4112387), Ship Mountain (4112367)

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