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Home/Species/ Yadon's Horkelia

Horkelia yadonii

Ertter

Yadon's Horkelia

G3Vulnerable Found in 2 roadless areas NatureServe Explorer →
G3VulnerableGlobal Rank
Identity
Unique IDELEMENT_GLOBAL.2.150094
Element CodePDROS0W0K0
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. 1999. A synonymized checklist and atlas with biological attributes for the vascular flora of the United States, Canada, and Greenland. First edition. In: Kartesz, J.T., and C.A. Meacham. Synthesis of the North American Flora, Version 1.0. North Carolina Botanical Garden, Chapel Hill, N.C.
Conservation Status
Review Date2014-09-03
Change Date1997-03-17
Edition Date2002-07-24
Edition AuthorsOliver, L.
Rank Reasons
Horkelia yadonii is endemic to California and known from Monterey, Santa Barbara, and San Luis Obispo counties (CNPS 2001 and Ertter 1993). H. yadonii is considered rare by the California Native Plant Society, and uncommon by Hickman (1993). The California Native Plant Society does consider it fairly endangered though, as it is potentially threatened by vehicles, recreation activities, such as camping (2001) and feral pigs (Ertter 1993).
Range Extent Comments
Horkelia yadonii occurs in the Santa Lucia, La Panza and San Rafael ranges of Monterey and San Luis Obispo, and Santa Barbara counties in California (Ertter 1993).
Threat Impact Comments
Horkelia yadonii is potentially threatened by off-road vehicle trails, camping activities and feral pigs (Ertter 1993). Ertter (1993) also comments that suitable habitats are uncommon and that these habitats are also prime camping sites.
Ecology & Habitat

Habitat

Horkelia yadonii is found on granitic soils of dry streambeds which are often flooded with water, in meadows in the chaparral or chaparral-foothills pine zone between 370 and 1850 meters in elevation (Ertter 1993),
Other Nations (1)
United StatesN3
ProvinceRankNative
CaliforniaS3Yes
Plant Characteristics
Economic Value (Genus)No
Roadless Areas (2)
California (2)
AreaForestAcres
Black ButteLos Padres National Forest5,116
Chalk PeakLos Padres National Forest7,472
References (5)
  1. 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.
  2. Ertter, Barbara. 1993. A Re-evaluation of the Horkelia bolanderi (Rosaceae) Complex, with the New Species Horkeli yadonii. Systematic Botany 18(1): 137-144.
  3. 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.
  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. 1999. A synonymized checklist and atlas with biological attributes for the vascular flora of the United States, Canada, and Greenland. First edition. In: Kartesz, J.T., and C.A. Meacham. Synthesis of the North American Flora, Version 1.0. North Carolina Botanical Garden, Chapel Hill, N.C.