Species Details

Epilobium siskiyouense

Siskiyou fireweed

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Species Description:

Epilobium siskiyouense, commonly known as Siskiyou fireweed, is a perennial herb in the Onagraceae that is found in California and elsewhere. It occurs within Alpine boulder and rock field, Subalpine coniferous forest, and Upper montane coniferous forest, growing at elevations from 1700 to 2500 meters. Epilobium siskiyouense is ranked 1B.3, Plants Rare, Threatened or Endangered in California and Elsewhere; Not very threatened in California.

Classification

Scientific Name: Epilobium siskiyouense (Munz) Hoch & Raven
Common Name: Siskiyou fireweed
Family:	Onagraceae
Element Code:	PDONA06100
USDA Plants Symbol:	EPSI2
Synonyms/Other Names:
Name Status:	JEP, FNA, POWO, IPNI, Tropicos

Conservation Status

CA Rare Plant Rank:	1B.3
Fed List:	None
State List:	None
Global Rank:	G3
State Rank:	S3
Other Status:	BLM_S; SB_BerrySB
CRPR Changes:
Add Date:	1980-01-01
Date Edited:	2024-11-05

Ecology and Life History

Lifeform: perennial herb

Blooming Period: Jul-Sep

Elevation:
1700 - 2500 meters
5580 - 8205 feet

General Habitats:

Alpine boulder and rock field
Subalpine coniferous forest
Upper montane coniferous forest

Microhabitat Details:

Microhabitat:

Rocky
Serpentine

Notes

Notes: Candidate for state listing in OR. See North American Flora II 5:205 (1965) for original description, and Madroño 27(3):146 (1980) for revised nomenclature.
Threats:
Taxonomy:

Threat List Data from the CNDDB

THREAT LIST:
Threat List Total:	7
	Total EOs	% of EOs
EOs with Threat Listed:	19	34 %
Foot traffic/trampling	8	14%
Mining	4	7%
Road/trail construction/maint.	3	5%
Development	3	5%
Grazing	2	3%
Erosion/runoff	1	1%
Other	1	1%

Occurrence Data from the CNDDB

Element Occurrence Ranks:
Total Occurrences:					56
A	B	C	D	X	U
9	9	1	0	0	37

Occurrence Status:
Historical >20 Years	52
Recent <=20 Years	4

Presence:
Presumed Extant	56
Possibly Extirpated	0
Presumed Extirpated	0

Location

California Endemic:

California Island:

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

California Counties and Islands: Name (Code)
Shasta (SHA), Siskiyou (SIS), Trinity (TRI)

Quads: Name (Quad Code)
Billys Peak (4112227), Boulder Peak (4112351), Bully Choop Mtn. (4012257), Caribou Lake (4112218), Chicken Hawk Hill (4112214), Covington Mill (4012287), Deadman Peak (4112228), Dees Peak (4112313), Dutch Creek (4112381), Figurehead Mtn. (4112383), Kangaroo Mtn. (4112382), Marble Mountain (4112352), Mount Eddy (4112234), Mumbo Basin (4112225), Preston Peak (4112375), Scott Mountain (4112236), Seven Lakes Basin (4112224), Siligo Peak (4012288), South China Mtn. (4112235), Ycatapom Peak (4112217)

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