Galinsoga quadriradiata Ruiz & Pav.
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Authority
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.
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Family
Asteraceae
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Scientific Name
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Description
Species Description - Freely branching, somewhat hairy, 2–7 dm, the hairs of the stem generally fairly coarse and spreading; lvs petiolate, with ovate (often broadly so), rather coarsely toothed blade 2.5–7 × 1.5–5 cm; heads mostly rather numerous (in well developed plants) in open, leafy cymes, slender-pedunculate, the peduncles and often also the invols spreading-villous, with gland-tipped hairs; outer invol bracts 1–2, herbaceous, deciduous, the inner 3–4 mm, deciduous with their attached receptacular bracts; rays (3–)5(6), white (pink), strongly 3-toothed, 2–3 mm, nearly as wide; inner receptacular bracts mostly entire; disk 3–6 mm wide; achenes black, hispidulous with appressed or ascending hairs; pappus of the disk of slender, fimbriate scales tapering to a short but definite awn-tip, often shorter than the cor, that of the rays of short but well developed fimbriate scales, about equaling the tube; 2n=32, 48, 64. Native of C. and S. Amer., now a cosmopolitan weed. June–Nov. (G. bicolorata and G. caracasana, with pink rays; G. ciliata)
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Common Names
common quickweed