Senecio integrifolius, (L.) Clairv.

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 : 199

33. S. integrifolius (L.) Clairv. , Man. Herb. Suisse 241 (1811).

Perennial (2-)15-70(-100) cm. Stock short, erect. Basal leaves (1—)2—10(—15) x (l-)2-5 cm, more or less appressed to the ground, suborbicular to oblong-elliptical, more or less petiolate; lower cauline ovate-lanceolate to lanceolate, sessile or narrowed into a short, winged petiole; middle and upper cauline lanceolate to linear, entire, sessile, subamplexicaul. Capitula 15-25 mm in diameter, solitary or up to 15 in a corymb; peduncles usually not more than twice as long as involucre. Involucre 5-8 mm. Achenes 2-5-4 mm. Much of Europe, but with discontinuous range, and absent from large areas. Al Au Br Cz Da Ga Ge Gr He Hu It Ju No Po Rm Rs (N, B, C, W, K, E) Su. 1 Basal and lower cauline leaves gradually narrowed into petiole 2 Plant with ± persistent, dark purplish or brownish tomentum at least above (h) subsp. atropurpureus 2 Plant without persistent, dark tomentum 3 Ligules c. 20 mm; involucre c. 7 mm (g) subsp. tundricola 3Ligules 7-11 mm; involucre c. 5 mm (f) subsp. czemjaevii 1 Basal and lower cauline leaves abruptly contracted into petiole 4 Plant densely and persistently whitish-tomentose or -lanate, especially above (d) subsp. capitatus 4 Plant more or less glabrescent 5Ligules orange or brownish-red (or sometimes absent) (e) subsp. aurantiacus 5 Ligules yellow or golden-yellow, always present 6 Involucral bracts purplish throughout; basal leaves sinuatedentate (c) subsp. serpentini 6 Involucral bracts usually green throughout 7 Basal leaves entire or remotely denticulate; involucre 6-8 mm (a) subsp. integrifolius 7 Basal leaves coarsely dentate; involucre 8-12 mm (b) subsp. maritimus