Senecio macrospermus Dc.

Stout perennial herb with a thick woody stock giving rise to a large clump of leaf rosettes, flowering stems up to 1 m tall, simple below the inflorescence, stout, leafy, leaves, flowering stems and involucres all enveloped in pale grey woolly tomentum. Radical leaves up to c. 60 x 8 cm, elliptic, tapering to a broad, clasping petiole-like base, these bases remaining as a fibrous crown on the stock, apex acute, margins minutely and closely callose-denticulate, somewhat undulate, tomentum eventually peeling to a cobwebby surface; cauline leaves similar but more oblong-elliptic, sessile, base broad and somewhat cordate-clasping, passing upwards into lanceolate-acuminate bracts. Heads radiate, up to c. 8 in a corymbose panicle. Involucre campanulate, bracts c. 20, 15-18 mm long, a little shorter than the disc, amply calycled. Rays c. 13, long and spreading, they and the disc bright yellow. Achenes c. 10 mm long, cylindric, ribbed, pubescent.