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One-awn Spineflower Back to Plant Page
Chorizanthe uniaristata

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About One-awn Spineflower (Chorizanthe uniaristata) Chorizanthe uniaristata is a species of flowering plant in the buckwheat family known by the common name one-awn spineflower. It is endemic to central California, where it is known from several of the local mountain ranges, as well as the Central Coast. It grows in sandy, gravelly, and rocky soils in chaparral and woodland. This plant has upright or decumbent stems up to about 25 centimeters in length. It is hairy and gray, green, or reddish in color. The inflorescence is a cluster of flowers, with each flower surrounded by an array of six hairy bracts. One bract is much longer than the others and has a long, straight awn; the other bracts have hooked awns. The flower is 2 or 3 millimeters long and usually white.
Plant Description
Plant Type
Annual herb

Max. Height
0.8 - 3.1 in (2 - 7.9 cm)

Flower Color
White, Pink

Native Status

Natural Setting
Elevation ?
65' - 7493'

Annual Precip. ?
6.6" - 42.0"

Summer Precip. ?
0.13" - 1.58"

Coldest Month ?
39.8° F - 53.6° F

Hottest Month ?
59.3° F - 81.0° F

Humidity ?
0.89 vpd - 31.20 vpd

Landscaping Information
Nursery Availability
Never or Almost Never Available

Other Names
Common Names
Oneawn Spineflower

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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