Ageratum
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Authority
Britton, Nathaniel L. & Millspaugh, Charles F. 1920. The Bahama Flora.
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Family
Asteraceae
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Scientific Name
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Description
Description - Annual or perennial herbs, or shrubs, with mostly toothed leaves, the small heads in terminal corymbs or cymes, the flowers all tubular. Involucre campanulate or subhemispheric, its narrow bracts nearly equal, imbricated in 2 or 3 series, sometimes with 1-3 smaller outer ones. Receptacle flat to conic. Corolla 5-toothed, white, blue, violet or purple. Anthers linear to oblong. Achenes 5-angled. Pappus of awned or awnless scales, distinct or connate. [Greek name of some similar plant.] About 25 species, mostly of tropical distribution. Type species: Ageratum conyzoides L.