UW Burke Herbarium species comparison

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Tetradymia nuttallii

Tetradymia canescens

gray horsebrush, spineless horsebrush
Habit Unarmed, much-branched shrubs, 2-6 dm. tall, closely grey-woolly throughout.
Leaves

Primary leaves linear to oblanceolate, entire, 1-3 cm. long, often with shorter and broader leaves in the primary leaf axils.
Flowers

Heads in small, flat-topped clusters terminating the numerous branches;

involucre 7-10 mm. high, cylindric, the bracts 4-5, erect and equal;

corollas 4 in each head, yellow, all tubular, the lobes longer than the throat;

pappus of numerous whitish, capillary bristles.
Fruits

Achenes terete, usually densely hairy.

Tetradymia nuttallii

Tetradymia canescens
Flowering time June-September
Habitat Dry, open places in sagebrush.
Distribution
[WildflowerSearch map]
[BONAP county map]
Occurring east of the Cascades crest in Washington; southern British Columbia to California, east to the Rocky Mountains.
[WildflowerSearch map]
[BONAP county map]
Origin Native
Conservation status Not of concern
Sibling taxa
T. canescens
Web links 
Unless otherwise noted, all data comes from the University of Washington's Burke Herbarium.



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Choose a data source: Flora of North America, OregonFlora, UW Burke Herbarium

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