Canadian Horseweed Flower Canadian Horseweed Stem Canadian Horseweed Stem Canadian Horseweed Leaves Canadian Horseweed Plant

Wildflowers of Southern Arizona


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Canadian Horseweed.
Conyza canadensis.
Aster (Asteraceae) family.

The tiny flower heads are at the branch tips of a highly branched flower stalk. The individual flower heads have yellow disk flowers that are almost hidden among the slender, white rays. The flowers are followed by fuzzy seed heads with a tan to whitish pappus. The leaves are green, hairy, narrow, alternate, mostly linear, and crowded along the main stem. This tall, upright weed resembles a green horse's tail and is unbranched below and highly branched above.

Santa Catalina Mountains.
Sunset Trailhead
Location: At edge of parking lot

See SEINet Pictures and Description

See FireFly Forest Pictures and Description

Thumb: Arizona Baccharis
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