Senecio congestus, (R. Br.) 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 : 201

40. S. congestus (R. Br.) DC. , Prodr. 6: 363 (1838)

( S. palustris (L.) Hooker , non Velloso, S. tubicaulis Mansfeld ; inch S. arcticus Rupr. ).

Annual, biennial or perennial 15-200 cm; stems erect, branched above or only in inflorescence, 1-4 cm in diameter, hollow, pubescent, sometimes glabrescent, leafy throughout. Leaves 5-15x 1-5 cm, oblong- or ovate- to linear-lanceolate, entire to coarsely dentate, rarely almost pinnatifid, usually undulate, pubescent or subglabrous; upper cauline leaves subentire, amplexicaul. Capitula many, 20-30 mm in diameter, in a lax or dense corymb or panicle. Involucre 10—12(—13) mm, arachnoid-villous at least below, green. Ligules c. 21, 7-10 mm, yellow. Achenes 2-3 mm, with almost winged ribs. Damp meadows and marshes. From Belgium, Denmark and arctic Russia southwards to C. France and C. Ukraine. Be fBr Cz Da Ga Ge Ho Po?Rm Rs (N, B, C, W, E) Su.