EOL-media-509-40468631

DescriptionAPI 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 12 September 2009, 13:02 Source Ageratina riparia leaf2 Author Harry Rose from South West Rocks, Australia