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San Francisco Spineflower Back to Plant Page
Chorizanthe cuspidata
  

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About San Francisco Spineflower (Chorizanthe cuspidata) Chorizanthe cuspidata is a species of flowering plant in the buckwheat family known by the common name San Francisco spineflower. It is endemic to California, where it is known only from the San Francisco Bay Area and to the immediate north and south. It grows in sandy coastal habitat. The Chorizanthe cuspidata plant grows flat along the ground, its stems extending up to about half a meter in length. The leaves are located about the base of the stem and are generally oval in shape and up to 5 centimeters long. The herbage is hairy to woolly in texture and green to reddish in color. The Chorizanthe cuspidata plant grows flat along the ground, its stems extending up to about half a meter in length. The leaves are located about the base of the stem and are generally oval in shape and up to 5 centimeters long. The herbage is hairy to woolly in texture and green to reddish in color. The inflorescence is a dense cluster of cylindrical flowers, each bordered by white or pink bracts with hooked or straight spines at the tips. The flower itself is 2 or 3 millimeters long, white or pink, and hairy. The minute tepals are lobed, with the central lobe longest and coming to a point. VarietiesThere are two varieties of this species:Chorizanthe cuspidata var. cuspidata is quite rare due to its Bay Area habitat having been mostly consumed for development. Chorizanthe cuspidata var. villosa can be found in the protected habitat of Point Reyes National Seashore.
Plant Description
Plant Type
Annual herb

Max. Height
0.16 - 1.6 ft (0.05 - 0.49 m)

Flower Color
Pink

Native Status
Native

Natural Setting
Elevation ?
7' - 2290'

Annual Precip. ?
10.8" - 59.6"

Summer Precip. ?
0.21" - 0.59"

Coldest Month ?
45.3° F - 51.0° F

Hottest Month ?
58.0° F - 70.6° F

Humidity ?
0.45 vpd - 16.01 vpd

Landscaping Information
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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