American burnweed,Pilewort,Butterweed,Eastern Burnweed,Fireweed,White Fireweed
Annuals, (50–)100–200 cm (glabrous or unevenly coarse-tomentose, sometimes ± succulent). Taproots with tufts of fibrous roots. Stems 1(–2+), erect. Leaves evenly distributed (proximal often withering before flowering); indistinctly petiolate or subsessile; blades ovate-lanceolate to lanceolate, (3–)6–20 × (1–)2–8 cm, margins subentire to serrate or weakly lobed (distal leaves clasping, bractlike). Heads 2–20(–40) in ± corymbiform arrays. Involucres urceolate or obconic, 10–17 mm. Phyllaries usually 21. Receptacles (disclike, conspicuously expanded when fresh) 5–12 mm diam. Cypselae 2.3–3 or 4–5 mm, nerves 10–12 or 16–20, faces puberulent between nerves or glabrous.
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Summer, Jun, Jul, Aug, Sep, Oct
Annual, Native Plant, Weed, Herb., Herb
Flowers lack petals but are white or cream-colored.
Seeds are in small, dandelion-like globes (small, wispy achenes) and are dispersed by wind.