Home/Species/ Snow Mountain Willowherb

Epilobium nivium

Brandeg.

Snow Mountain Willowherb

G2Imperiled (G2G3) Found in 4 roadless areas NatureServe Explorer →

G2ImperiledGlobal Rank

Medium - lowThreat Impact

Identity

Unique IDELEMENT_GLOBAL.2.138655

Element CodePDONA060M0

Record TypeSPECIES

ClassificationSpecies

Classification StatusStandard

Name CategoryVascular Plant

Endemicendemic to a single state or province

KingdomPlantae

PhylumAnthophyta

ClassDicotyledoneae

OrderMyrtales

FamilyOnagraceae

GenusEpilobium

Concept Reference

Kartesz, J.T. 1994. A synonymized checklist of the vascular flora of the United States, Canada, and Greenland. 2nd edition. 2 vols. Timber Press, Portland, OR.

Conservation Status

Rank MethodLegacy Rank calculation - Excel v3.1x

Review Date2017-04-25

Change Date2017-04-25

Edition Date2017-04-25

Edition AuthorsD. Gries, rev. R. Bittman (7/98), rev. R. Bittman and A. Treher (2016), rev. R. Bittman (2017)

Threat ImpactMedium - low

Range Extent1000-5000 square km (about 400-2000 square miles)

Number of Occurrences6 - 20

Rank Reasons

Endemic to California, Epilobium nivium is known from sixteen occurrences in five counties; seven occurrences have been observed recently. All or most of the occurrences are on public land, but the plant is not formally protected. May be threatened by recreational activities but the plant is somewhat protected due to the inaccessibility and remoteness of its habitat.

Range Extent Comments

Endemic to northwestern California. Occurring in Colusa, Glenn, Lake, Mendocino, Tehama, and Trinity Counties (CNDDB 2017).

Occurrences Comments

Sixteen 16 mapped occurrences; 9 of them are historic and need rechecking (CNDDB 2017).

Threat Impact Comments

At some sites, the threat of recreational use, trail use, or ORVs is mentioned, but none of these threats are confirmed (CNDDB 2017). The inaccessibility of the sites confers some protection (Bittman 1998).

Ecology & Habitat

Habitat

Chaparral, upper montane coniferous forest; rocky soils (Skinner, 1997).

Terrestrial Habitats

Forest/WoodlandForest - ConiferShrubland/chaparral

Other Nations (1)

United StatesN2

Province	Rank	Native
California	S2	Yes

Threat Assessments

Threat	Scope	Severity	Timing
6 - Human intrusions & disturbance	Restricted (11-30%)	Serious - slight	High (continuing)
6.1 - Recreational activities	Restricted (11-30%)	Serious - slight	High (continuing)

Plant Characteristics

DurationPERENNIAL

Economic Value (Genus)No

Roadless Areas (4)

California (4)

Area	Forest	Acres
Briscoe	Mendocino National Forest	7,212
Skeleton Glade	Mendocino National Forest	9,237
Snow Mountain	Mendocino National Forest	14,457
Wilderness Contiguous	Mendocino National Forest	3,606

References (6)

Bittman, R. 1998. Lead Botanist, California Natural Diversity Database. Unpublished notes on fifty rare plants of California for purposes of updating Element Global Ranking (EGR) forms. California Natural Heritage Division, Dep. of Fish & Game, Sacramento, California, U.S.A.
California Natural Diversity Database (CNDDB). 2016. RareFind Version 5.1.1. California Department of Fish and Game, Sacramento.
California Natural Diversity Database (CNDDB). 2017. RareFind Version 5.2.14. California Department of Fish and Game, Sacramento.
Flora of North America Editorial Committee (FNA). 2021. Flora of North America north of Mexico. Vol. 10. Magnoliophyta: Proteaceae to Elaeagnaceae. Oxford Univ. Press, New York. xxiv + 456 pp.
Kartesz, J.T. 1994. A synonymized checklist of the vascular flora of the United States, Canada, and Greenland. 2nd edition. 2 vols. Timber Press, Portland, OR.
Skinner, M.W., and B.M. Pavlik, eds. 1997 (1994). Inventory of rare and endangered vascular plants of California. 1997 Electronic Inventory Update of 1994 5th edition, California Native Plant Society, Special Publication No. 1, Sacramento.

Epilobium nivium

Habitat

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