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Home/Species/ Twisselmann's Buckwheat

Eriogonum twisselmannii

(J.T. Howell) Reveal

Twisselmann's Buckwheat

G2Imperiled Found in 1 roadless area NatureServe Explorer →
G2ImperiledGlobal Rank
HighThreat Impact
Identity
Unique IDELEMENT_GLOBAL.2.137454
Element CodePDPGN08610
Record TypeSPECIES
ClassificationSpecies
Classification StatusStandard
Name CategoryVascular Plant
Endemicendemic to a single state or province
KingdomPlantae
PhylumAnthophyta
ClassDicotyledoneae
OrderPolygonales
FamilyPolygonaceae
GenusEriogonum
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
Review Date2017-05-08
Change Date1984-04-06
Edition Date1997-10-30
Edition AuthorsD. Gries, rev. R. Bittman 2006
Threat ImpactHigh
Range Extent<100 square km (less than about 40 square miles)
Number of Occurrences6 - 20
Rank Reasons
Endemic to California, Erigonum twisselmannii is known from 13 EO's in Tulare County; several have not been seen in over 20 years. Threats include off-road vehicle use, smothering by Cuscuta and possibly logging. The total acreage and number of plants is low. There are no formally protected sites; all of them occur on USFS lands in the Sequoia NF.
Range Extent Comments
Endemic to area near Slate Mtn in Tulare County, California.
Occurrences Comments
13 EOs; 9 are historic but are still probably extant.
Threat Impact Comments
Threats listed include OHV use and smothering by Cuscuta. Logging is a potential threat.
Ecology & Habitat

Habitat

Dry, rocky, often granitic outcrops within Yellow Pine Forest and Upper Montane Coniferous Forest communities. 2300 - 2800 m.
Terrestrial Habitats
Forest/WoodlandForest - ConiferBare rock/talus/scree
Other Nations (1)
United StatesN2
ProvinceRankNative
CaliforniaS2Yes
Plant Characteristics
Economic Value (Genus)No
Roadless Areas (1)
California (1)
AreaForestAcres
RinconSequoia National Forest54,610
References (8)
  1. 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)
  2. 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.
  3. Flora of North America Editorial Committee (FNA). 2005. Flora of North America north of Mexico. Vol. 5. Magnoliophyta: Caryophyllidae: Caryophyllales, Polygonales, and Plumbaginales. Oxford Univ. Press, New York. vii + 656 pp.
  4. Hickman, J. C., ed. 1993. The Jepson manual: Higher plants of California. University of California Press, Berkeley, CA. 1400 pp.
  5. 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.
  6. Munz, P.A. 1968. Supplement to a California flora. Univ. California Press. Berkeley. 224 pp.
  7. Pearson, D.C. 1989. Endangered species alert program manual: Species accounts and procedures. Southern California Edison Environmental Affairs Division.
  8. 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.