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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 Symbol: COCAG
USDA Native Status: L48 (N), AK (I)
Glabrous stems distinguish this variety.
From the Image Gallery
No images of this plant
Plant Characteristics
Duration: AnnualHabit: Herb
Root Type: Tap
Leaf Arrangement: Alternate
Leaf Complexity: Simple
Size Notes: Up to about 6 feet tall. Occasionally up to almost 12 feet tall.
Fruit: Fruit is a cypsela (pl. cypselae). Though technically incorrect, the fruit is often referred to as an achene.
Bloom Information
Bloom Color: White , Yellow , PurpleBloom Time: Jan , Feb , Mar , Apr , May , Jun , Jul , Aug , Sep , Oct , Nov , Dec
Bloom Notes: White to pale purplish small ray flowers, yellow disc flowers. Flowers mostly summer through fall. May flower year-round in the right conditions.
Distribution
USA: AK , AZ , CA , CO , ID , NM , NV , OK , OR , RI , TX , UT , WA , WYCanada: 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
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
Additional resources
USDA: Find Conyza canadensis var. glabrata in USDA PlantsFNA: Find Conyza canadensis var. glabrata in the Flora of North America (if available)
Google: Search Google for Conyza canadensis var. glabrata
Metadata
Record Modified: 2022-12-07Research By: TWC Staff