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Plant Database

Search for native plants by scientific name, common name or family. If you are not sure what you are looking for, try the Combination Search or our Recommended Species lists.

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Conyza canadensis var. glabrata

Conyza canadensis (L.) Cronquist var. glabrata (A. Gray) Cronquist

Canadian Horseweed, Horseweed

Asteraceae (Aster Family)

Synonym(s): Erigeron canadensis var. glabratus


USDA Native Status: L48 (N), AK (I)


From the Image Gallery

No images of this plant

Plant Characteristics

Duration: Annual
Habit: Herb
Root Type: Tap
Leaf Arrangement: Alternate
Leaf Complexity: Simple
Fruit Type: Achene
Size Class: 3-6 ft.

Bloom Information

Bloom Color: White , Yellow , Purple
Bloom Time: Aug , Sep
Bloom Notes: White or purplish small ray flowers and yellow disk flowers.


USA: AK , AZ , CA , CO , ID , NM , NV , OK , OR , RI , TX , UT , WA , WY
Canada: BC

From the National Organizations Directory

According to the species list provided by Affiliate Organizations, this plant is on display at the following locations:

Lady Bird Johnson Wildflower Center - Austin, TX

Additional resources

USDA: Find Conyza canadensis var. glabrata in USDA Plants
FNA: Find Conyza canadensis var. glabrata in the Flora of North America (if available)
Google: Search Google for Conyza canadensis var. glabrata


Record Modified: 2011-08-06
Research By: TWC Staff

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