Home/Species/ Crested Potentilla

Potentilla cristae

Ferlatte & Strother

Crested Potentilla

G2Imperiled Found in 1 roadless area NatureServe Explorer →

G2ImperiledGlobal Rank

LowThreat Impact

Identity

Unique IDELEMENT_GLOBAL.2.161406

Element CodePDROS1B2F0

Record TypeSPECIES

ClassificationSpecies

Classification StatusStandard

Name CategoryVascular Plant

Endemicendemic to a single state or province

KingdomPlantae

PhylumAnthophyta

ClassDicotyledoneae

OrderRosales

FamilyRosaceae

GenusPotentilla

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 Date2013-05-01

Change Date1993-07-07

Edition Date2013-03-21

Edition AuthorsD. Gries, rev. R. Bittman (7/98), rev. A. Treher and Bittman (2013)

Threat ImpactLow

Range Extent250-1000 square km (about 100-400 square miles)

Number of Occurrences6 - 20

Rank Reasons

Endemic to California, Potentilla cristae is known from seven occurrences in the Klamath Region in Siskiyou and Trinity Counties. All occurrences are within National Forest land and apparently, there are no immediate threats to this species.

Range Extent Comments

California endemic, known only from the Klamath Region of northern California: on Cory Peak and Mt. Eddy on the boundary between Siskiyou and Trinity Counties and from Boulder Peak and Marble Mountain in Siskiyou County (Ferlatte, 1990). Area of the minimum convex polygon, range extent, is 482 sq km.

Occurrences Comments

Known from seven occurrences; none of which have been seen in the last twenty years (Bittman 1998 and CNDDB 2013).

Threat Impact Comments

Apparently not very threatened; some historical sites may still be extant (Bittman 1998).

Ecology & Habitat

Habitat

Alpine boulder and rock field, subalpine coniferous forest; seasonally mesic, often serpentinite seeps, gravelly or rocky soils (Skinner, 1997). Associated trees include Pinus monticola, Pinus balfouriana, Pinus jeffreyi, Pinus contorta, and Abies concolor. Other associated vegetation includes Carex microptera, Juncus mertensianus, Poa pringlei, Ivesia gordonii, Silene grayi, Arenaria nuttallii ssp. gregaria, and Veronica copelandii (Ferlatte, 1990).

Terrestrial Habitats

Forest/WoodlandForest - ConiferAlpineBarrensBare rock/talus/scree

Other Nations (1)

United StatesN2

Province	Rank	Native
California	S2	Yes

Plant Characteristics

Economic Value (Genus)No

Roadless Areas (1)

California (1)

Area	Forest	Acres
Castle Crags B	Shasta-Trinity National Forest	1,619

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). 2013. RareFind Version 4. California Department of Fish and Game, Sacramento.
Ferlatte, W.J. 1990. Potentilla cristae (Rosaceae), a new species from northwestern California. Madrono 37(3):190-194.
Flora of North America Editorial Committee (FNA). 2014b. Flora of North America north of Mexico. Vol. 9. Magnoliophyta: Picramniaceae to Rosaceae. Oxford University Press, New York. xxiv + 713 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.