Erect herbs to 1.8 m high, not leafier in lower 1/3 at anthesis. Taproot inconspicuous; secondary roots fleshy. Stems glabrous or sparsely appressed-cottony, becoming glabrous. Leaves very narrowly elliptic, 8–24 cm long, with l:w ratio c. 8–12; base without auricles; margin with small or minute teeth; upper surface sparsely appressed-cottony or glabrous; lower surface sparsely cobwebby or minutely hispid, generally not purple. Capitula numerous per stem; calycular bracteoles 4–8, 1–2 mm long; peduncle and calyculus not cobwebby or more often moderately cobwebby at anthesis; involucre 7–9 mm long, c. 2.5 mm diam.; bracts mostly 12–14, cobwebby or nearly glabrous. Florets 30–50. Achenes bottle-shaped, 4–6 mm long, brown, with papillose hairs scattered in lines; l:w ratio of hairs c. 1–2. Pappus 6–7 mm long.
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