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Tetradymia canescens (Spineless horsebrush)
Cressler, Alan

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.


From the Image Gallery

18 photo(s) available in the Image Gallery

Plant Characteristics

Duration: Perennial
Habit: Subshrub
Leaf: White-Gray

Bloom Information

Bloom Color: Yellow
Bloom Time: Jul , Aug


USA: AZ , CA , CO , ID , MT , NM , NV , OR , UT , WA , WY
Canada: BC

Growing Conditions

Water Use: Low
Light 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

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 Plants
FNA: Find Tetradymia canescens in the Flora of North America (if available)
Google: Search Google for Tetradymia canescens


Record Modified: 2017-07-07
Research By: TWC Staff

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