Elmer's Ragwort

Perennials, 10–20(–30) cm (rhizomes trailing or branching). Herbage unevenly villous-tomentose or floccose, glabrescent. Stems single (from loosely clustered basal leaves). Leaves progressively reduced distally; ± petiolate; blades ovate to oblanceolate, (3–)4–8(–10) × 2–3(–4) cm, bases tapered, margins shallowly dentate (mid and distal leaves smaller, bractlike, often clasping). Heads erect or weakly nodding (especially in bud), (2–)5–9(–12) in loose, cymiform arrays. Calyculi of 2–7 lance-linear to linear bractlets (lengths ¹ / 3 – ² / 3 phyllaries). Phyllaries (± 8) ± 13, 8–10 mm, tips black (villous). Ray florets ± 8; corolla laminae 8–15 mm. Cypselae glabrous. 2n = 40.

Senecio crepidineus Greene