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Home/Species/ Howell's Tauschia

Tauschia howellii

(Coult. & Rose) J.F. Macbr.

Howell's Tauschia

G2Imperiled (G2G3) Found in 3 roadless areas NatureServe Explorer →
G2ImperiledGlobal Rank
LowThreat Impact
Identity
Unique IDELEMENT_GLOBAL.2.128787
Element CodePDAPI27050
Record TypeSPECIES
ClassificationSpecies
Classification StatusStandard
Name CategoryVascular Plant
Endemicendemic to a single nation
KingdomPlantae
PhylumAnthophyta
ClassDicotyledoneae
OrderApiales
FamilyApiaceae
GenusTauschia
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 Date2017-06-07
Change Date2017-06-07
Edition Date2017-06-07
Edition AuthorsVrilakas, S., J. Kagan, & K. Maybury, rev. A. Tomaino (2011), rev. Treher (2017)
Threat ImpactLow
Range Extent5000-20,000 square km (about 2000-8000 square miles)
Number of Occurrences1 - 20
Rank Reasons
Restricted to high elevations in the Siskiyou Mountains of southwestern Oregon and adjacent northwestern California. Very local; known only from 9 occurrences in 3 general areas. Threats are low.
Range Extent Comments
Endemic to southwestern Oregon and adjacent northwestern California.
Occurrences Comments
Nine occurrences, located in three general areas. Four occurrences are in California and five are in Oregon (EO data in the NatureServe central database as of July 2011).
Threat Impact Comments
Possibly threatened by vehicles (CNPS 2011). Other possible threats include trampling, and deer and cattle grazing (EO data in the NatureServe central database as of July 2011).
Ecology & Habitat

Habitat

On loose granitic sand/gravel on dry, alpine and subalpine ridges and slopes at (1700) 2000-2500 m elevation, often adjacent to Shasta red fir (Abies magnifica var. shastensis) forests (Meinke 1982; Hickman 1993). Habitat is subalpine coniferous forest and upper montane coniferous forest (CNPS 2011).
Terrestrial Habitats
Forest/WoodlandForest - ConiferAlpineBare rock/talus/scree
Other Nations (1)
United StatesN2
ProvinceRankNative
OregonS1Yes
CaliforniaS2Yes
Threat Assessments
ThreatScopeSeverityTiming
2 - Agriculture & aquacultureRestricted (11-30%)Moderate or 11-30% pop. decline—
6 - Human intrusions & disturbanceLarge - restrictedModerate or 11-30% pop. decline—
8 - Invasive & other problematic species, genes & diseasesRestricted (11-30%)Moderate or 11-30% pop. decline—

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Plant Characteristics
Economic Value (Genus)No
Roadless Areas (3)
California (3)
AreaForestAcres
Middle YubaTahoe National Forest7,379
Oat Mtn.Sequoia National Forest12,223
Sycamore SpringsSierra National Forest10,015
References (8)
  1. Abrams, L. 1951. Illustrated flora of the Pacific states: Washington, Oregon, and California. Vol. 3. Geraniaceae to Scrophulariaceae. Stanford Univ. Press, Stanford, California. 866 pp.
  2. Baldwin, B.G., S. Boyd, D.J. Keil, R.W. Patterson, T.J. Rosatti and D.H. Wilken eds. 2011. Jepson Flora Project: Jepson Online Interchange for California Floristics. Regents of the University of California, Berkeley. Online. Available: http://ucjeps.berkeley.edu/interchange/ (accessed 2011).
  3. California Native Plant Society (CNPS). 2011. Inventory of Rare and Endangered Plants. California Native Plant Society. Sacramento, CA. Online. Available: http://www.cnps.org/inventory (accessed 2011).
  4. Flora of North America Editorial Committee (FNA). 2024. Flora of North America north of Mexico. Vol. 13. Magnoliophyta: Geraniaceae to Apiaceae. Oxford Univ. Press, New York. xxiv + 566 pp.
  5. Hickman, J. C., ed. 1993. The Jepson manual: Higher plants of California. University of California Press, Berkeley, CA. 1400 pp.
  6. 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.
  7. Meinke, R.J. 1982. Threatened and Endangered Vascular Plants of Oregon: An Illustrated Guide. U.S. Fish and Wildlife Service, Region 1, Portland, Oregon. 326 pp.
  8. Peck, M.E. 1961. A manual of the higher plants of Oregon. 2nd edition. Binsford & Mort, Portland, Oregon. 936 pp.