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Hairy Horsebrush
Tetradymia comosa
About Hairy Horsebrush (Tetradymia comosa) 1 Nurseries Carry This Plant Tetradymia comosa is a species of flowering plant in the aster family, known by the common name hairy horsebrush. The plant is native to the Transverse Ranges and Peninsular Ranges in Southern California and northern Baja California. It grows in local chaparral and woodlands habitats, such as coastal sage scrub and montane chaparral and woodlands. Tetradymia comosa is a whitish woolly shrub growing 30 centimetres (12 in) to over 1 metre (3. 3 ft) tall. The leaves are lance-shaped and up to 6 centimeters long, becoming rigid as they age, sometimes with their tips hardening to spines. The inflorescence bears three to six flower heads which are each enveloped in five or six thick phyllaries coated in white woolly hairs. Each head contains five to nine yellow or brownish flowers each around a centimeter long. The fruit is a small, hairy achene.
Plant Description
Plant Type
Plant Type

1 - 4 ft tall

Wildlife Supported

Butterflies & moths hosted ( 1 likely * ) SHOW ALL
Hemileuca burnsi Image
Hemileuca burnsiHemileuca burnsi

Landscaping Information
Full Sun


Natural Setting
Annual Precipitation: 7.0" - 35.9", Summer Precipitation: 0.15" - 2.45", Coldest Month: 33.2" - 57.7", Hottest Month: 59.3" - 83.3", Humidity: 1.83" - 34.24", Elevation: -3814" - 7419"

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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