Long-leaf camphorweed

Perennials, 60–150(–250) cm; fibrous-rooted. Stems sparsely arachnose. Leaves (crowded) sessile; blades oblong to elliptic, lance-ovate, or ovate, mostly 8–20 × 3–7 cm (bases clasping to subclasping), margins coarsely and irregularly toothed, abaxial faces villous and sessile-glandular, adaxial hirtellous and sessile-glandular. Heads in corymbiform arrays. Involucres cylindro-campanulate, 9–12 × 6–9 mm (lengths mostly 2 times diams.). Phyllaries creamy white, powdery puberulent, sometimes sparsely glandular (mid phyllaries 2.5–3 mm wide). Corollas creamy white. Pappi persistent, bristles basally connate.

Flowering Jun–Oct(–Nov). Brackish to fresh swamps, marshes, hammocks, lake shores, ditches, and canals; 0–10 m; Fla.