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Tetradymia canescens
Tetradymia canescens DC.
Spineless Horsebrush
Asteraceae (Aster Family)
Synonym(s): Tetradymia canescens var. inermis
USDA Symbol: TECA2
USDA Native Status: L48 (N), CAN (N)
Spineless Horsebrush is a member of the aster family (family Asteraceae) which includes herbs, sometimes shrubs or vines, rarely trees, with simple or compound, alternate or opposite leaves. Flowers small, but organized into larger heads resembling a single, radially symmetrical flower cupped by a ring of green bracts. In this large, worldwide family there are about 920 genera and 19,000 species. Cosmos, Sunflower, Zinnia, Dahlia, and many others are grown as ornamentals; Lettuce, Sunflowers, and Artichokes provide food. Safflower oil is obtained from this family. Ragweed pollen causes hay fever.
Plant Characteristics
Duration: PerennialHabit: Subshrub
Size Notes: Up to about 32 inches tall.
Leaf: White-Gray
Fruit: Fruit is a cypsela (pl. cypselae). Though technically incorrect, the fruit is often referred to as an achene.
Bloom Information
Bloom Color: YellowBloom Time: Mar , Apr , May , Jun , Jul , Aug , Sep , Oct , Nov
Bloom Notes: Cream to bright yellow.
Distribution
USA: AZ , CA , CO , ID , MT , NM , NV , OR , UT , WA , WYCanada: BC
Growing Conditions
Water Use: LowLight Requirement: Sun
CaCO3 Tolerance: High
Find Seed or Plants
Find seed sources for this species at the Native Seed Network.
From the National Organizations Directory
According to the species list provided by Affiliate Organizations, this plant is on display at the following locations:Native Seed Network - Corvallis, OR
Web Reference
Webref 38 - Flora of North America (2019) Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA.Webref 23 - Southwest Environmental Information Network (2009) SEINet - Arizona Chapter
From the Archive
Wildflower Newsletter 1990 VOL. 7, NO.4 - Research Update, Wild-Collecting Endangers Natives, Director's Report, Maryland ...Additional resources
USDA: Find Tetradymia canescens in USDA PlantsFNA: Find Tetradymia canescens in the Flora of North America (if available)
Google: Search Google for Tetradymia canescens
Metadata
Record Modified: 2023-01-27Research By: TWC Staff