Senecio hypochoerideus Dc.

Rhizomatous perennial herb up to c. 75 cm tall, rhizome thick (up to 1 cm diam.), branched, producing numerous congested leaf rosettes, older parts clad in thick marcescent leaf bases, flowering stems one or several from each crown, lateral to the rosettes, simple below the inflorescence, white glandular-pilose, leafy. Radical leaves up to 30 x 1-3(-4) cm, mostly oblong or oblanceolate, obtuse, tapering to a broad flat petiole-like base expanded below, clasping, imbricated, thick-textured, rigid, margins doubly callose-serrate, rarely only serrate, both surfaces harshly glandular-pilose to glandular-pubescent; cauline leaves similar but sessile, the upper often lanceolate, acute, base often cordate-clasping, margins serrate or doubly serrate. Heads discoid or radiate, 3-10 corymbose-paniculately arranged on nearly nude peduncles. Involucre campanulate, bracts c. 16-20, (10-)13 mm long, about equalling the disc, calyculus sparse, all glandular-pilose on the back, some hairs often 1-2 mm long. Rays, when present, (8-)13, long and spreading,' they and the disc bright yellow. Achenes 4-5 mm long, narrowly cylindric, closely ribbed, white hispid.