Adenostyles Cass.

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 : 189

92. Adenostyles Cass. 1

Perennial herbs. Leaves alternate. Inflorescence corymbose, with numerous small capitula. Florets all tubular and hermaphrodite. Involucral bracts 3-8, with few small supplementary bracts. Receptacle flat, without scales. Achenes subterete, 10-ribbed; pappus-hairs numerous, in 2-3 rows, denticulate.

1 Leaves white-floccose-lanate, at least beneath 3. leucophylla 1 Leaves green on both surfaces, glabrous to rather sparsely arachnoid-pubescent beneath

2 Upper cauline leaves sessile and semi-amplexicaul, or petiolate, with semi-amplexicaul auricles; teeth very unequal; ultimate veins forming an indistinct, lax reticulum beneath

1. alliariae 2 Upper cauline leaves usually petiolate, without semi-amplexicaul auricles; teeth + equal; ultimate veins forming a prominent, close reticulum beneath 2. alpina