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Eriogonum callistum
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Tehachapi Buckwheat
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Eriogonum callistum
  

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About Tehachapi Buckwheat (Eriogonum callistum) Eriogonum callistum is a rare species of wild buckwheat, known by the common name Tehachapi buckwheat. The perennial herb is endemic to California, found only in the southwestern Tehachapi Mountains, in Kern County, Southern California. There are an estimated 2000 individuals in existence, in several sites on the eastern Tejon Ranch, between Castaic Lake and the Antelope Valley. It is found on the Tejon Ranch. It grows in rocky limestone soils in chaparral habitat among manzanitas. The plant was only described to science in 2006. Eriogonum callistum is a perennial herb forming a mat of woolly whitish green herbage on a woody base measuring up to 35 centimeters tall and up to 1 m (3 ft. ) wide. It grows from a woody taproot and branching caudex. It is covered in rosettes of leaves each up to 5 centimeters long by 2 wide. The blades are coated densely in grayish white silky hairs. The inflorescence arises on an erect stem up to 40 or 45 centimeters tall which is whitish and hairy when new and turns reddish as it ages. The inflorescence itself is a cluster of up to 35 flowers a few centimeters wide. The woolly flowers are pink-tinged when in bud and turn bright white when open. The stamens are tipped with yellow or pink anthers. Within genus Eriogonum this is the only species in the new section named Lanocephala in subgenus Eucycla. Eriogonum callistum is a Critically Imperiled endemic species in California, and is on the California Native Plant Society Inventory of Rare and Endangered Plants of California, listed as Seriously Endangered in California.
Plant Description
Plant Type
Perennial herb

Max. Height
0.16 - 1.2 ft (0.05 - 0.37 m)

Flower Color
Cream, Pink, White

Native Status
Natural Setting
Elevation ?
4068' - 5682'

Annual Precip. ?
14.5" - 16.6"

Summer Precip. ?
0.35" - 0.42"

Coldest Month ?
44.1° F - 47.2° F

Hottest Month ?
66.0° F - 70.8° F

Humidity ?
4.26 vpd - 22.21 vpd

Landscaping Information
Common uses
Butterfly Gardens, Bee Gardens

Nursery Availability
Never or Almost Never Available


Sources include: Wikipedia. All text shown in the "About" section of these pages is available under the Creative Commons Attribution-ShareAlike License. Plant observation data provided by the participants of the California Consortia of Herbaria, Sunset information provided by Jepson Flora Project. Propogation from seed information provided by the Santa Barbara Botanical Garden from "Seed Propagation of Native California Plants" by Dara E. Emery. Sources of plant photos include CalPhotos, Wikimedia Commons, and independent plant photographers who have agreed to share their images with Calscape. Other general sources of information include Calflora, CNPS Manual of Vegetation Online, Jepson Flora Project, Las Pilitas, Theodore Payne, Tree of Life, The Xerces Society, and information provided by CNPS volunteer editors, with special thanks to Don Rideout. Climate data used in creation of plant range maps is from PRISM Climate Group, Oregon State University, using 30 year (1981-2010) annual "normals" at an 800 meter spatial resolution.

Links:   Jepson eFlora Taxon Page  CalPhotos  Wikipedia  Calflora

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