Senecio petasitis, (Sims) DC.

Tutin, T. G., Heywood, V. H., Burges, N. A., Moore, D. M., Valentine, D. H., Walters, S. M. & Webb, D. A., 1976, Flora Europaea. Volume 4. Plantaginaceae to Compositae (and Rubiaceae), Cambridge University Press : 198

32. S. petasitis (Sims) DC. , Prodr. 6: 431 (1838).

Perennial up to 120 cm. Stems erect, rather fleshy, branched, densely pubescent. Basal and lower cauline leaves 5-20 cm, suborbicular, more or less cordate at base and long-petiolate, shallowly palmately lobed, sparsely callose-denticulate but otherwise entire, sparsely tomentose-pubescent above, more densely so beneath. Capitula many, 20-30 mm in diameter, in an ovoid panicle. Involucre 9-11 mm, pubescent, without supplementary bracts. Ligules 5-6, 10-12 mm, bright yellow. Cultivatedfor ornament and naturalized in S. Europe. [Az It Si.] (Mexico.)