File:Ageratina riparia flowerheads1 (11508534465).jpg

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Summary

Description Introduced, cool-season, perennial, erect, sometimes decumbent herb, 30–100 cm tal. Stems are purplish, spreading prostrate in lower parts, rooting at nodes and hairy (but not glandular-hairy). Leaves are lanceolate or narrow-ovate, 3–12 cm long, much longer than broad, hairless or slightly hairy on veins and prominently veined. Flowerheads are corymbs with crowded heads 5–6 mm wide. Involucral bracts are 2-seriate, hairy and green to purplish. Florets are all tubular and white. Flowering is in winter and spring. A native of central America, it grows in disturbed damp sites, often in or near rainforest.
Date
Source Ageratina riparia flowerheads1
Author Harry Rose from South West Rocks, Australia

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This image was originally posted to Flickr by Macleay Grass Man at https://www.flickr.com/photos/73840284@N04/11508534465. It was reviewed on 26 May 2015 by FlickreviewR and was confirmed to be licensed under the terms of the cc-by-2.0.

26 May 2015

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12 September 2009

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