Solidago canadensis flowerhead1 (16189416842)

Description:

Description: Introduced, warm season, perennial, stoloniferous, ± glabrous to hairy or scabrous herb 0.8–2 m tall. Stems are unbranched below the flowerheads. Basal leaves few, petiolate, soon withering; cauline leaves are numerous, sessile, lanceolate or oblong-lanceolate, 2–12 cm long, 4–20 mm wide, margins entire to toothed, upper surface densely scabrous, lower surface ± hairy or scabrous. Flowerheads are pyramidal panicles 5–25 cm long. Heads occur on one side of the rachis and are 5–6 mm diam.; involucral bracts occur in c. 3 series and are yellow-green. Ray florets are 9–15 in number and yellow. Disc florets are 2–8 in number and yellow. Achenes are 0.8–2 mm long, sparsely hairy, with a 2–3 mm long pappus. Flowering is in summer. A native of North America, it is a garden escape that is naturalized on wasteland. Date: 11 April 2006, 10:28. Source: Solidago canadensis flowerhead1. Author: Harry Rose from South West Rocks, Australia.