Home/Species/ Kern Plateau Horkelia

Horkelia tularensis

(J.T. Howell) Munz

Kern Plateau Horkelia

G2Imperiled Found in 1 roadless area NatureServe Explorer →

G2ImperiledGlobal Rank

LowThreat Impact

Identity

Unique IDELEMENT_GLOBAL.2.130854

Element CodePDROS0W0H0

Record TypeSPECIES

ClassificationSpecies

Classification StatusStandard

Name CategoryVascular Plant

Endemicendemic to a single state or province

KingdomPlantae

PhylumAnthophyta

ClassDicotyledoneae

OrderRosales

FamilyRosaceae

GenusHorkelia

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 Date2012-11-28

Change Date2013-08-20

Edition Date2005-09-28

Edition AuthorsD. Gries, R. Bittman 2005

Threat ImpactLow

Range Extent<100 square km (less than about 40 square miles)

Number of Occurrences1 - 5

Rank Reasons

Endemic to California, Horkelia tularensis is known from approximately 5 occurrences in Tulare County; two are historical. Threats include logging and grazing, though the extent of these threats is probably not great. All known occurrences occur above timberline on the Sequoia NF. None are formally protected.

Range Extent Comments

Horkelia tularensis is only known from a small area in the Sequoia NF on one USGS quadrangle. The range extent is estimated as about 14 sq mi.

Occurrences Comments

5 total EO's; 2 are historical.

Threat Impact Comments

Threats listed inlcude logging and grazing, though how imminent, severe and extensive these are is not known well.

Ecology & Habitat

Habitat

Dry rocky balds and flats within Red Fir Forest community. 2300 - 3050 m.

Terrestrial Habitats

Forest/WoodlandForest - Conifer

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
South Sierra	Sequoia National Forest	8,008

References (7)

CalFlora. 2005. Information on California plants for education, research and conservation. Berkeley, California: The CalFlora Database [web application]. Available: http://www.calflora.org/. (Accessed 2005)
California Native Plant Society (CNPS). 2001. Inventory of Rare and Endangered Plants of California (sixth edition). Rare Plant Scientific Advisory Committee, David P. Tibor, Convening Editor. California Native Plant Society. Sacramento, CA. x + 388pp.
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.
Hickman, J. C., ed. 1993. The Jepson manual: Higher plants of California. University of California Press, Berkeley, CA. 1400 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.
Munz, P.A. 1968. Supplement to a California flora. Univ. California Press. Berkeley. 224 pp.
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.