Ligularia 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 : 205

97. Ligularia Cass. 1

( Senecillis Gaertner )

Like Senecio but basal and lower cauline leaves with petioles broadly sheathing at the base.

A large genus, mainly of temperate Asia, differentiated from Senecio by a number of inconstant characters. The presence or absence of a leaf-sheath is the only convenient character for separating the 2 genera as they are represented in Europe. 1 Inflorescence corymbose, bracteate only at base 3. dentata

1 Inflorescence spicate, bracteate throughout

2 Basal leaves narrowed at base; pappus shorter than achene 2. glauca

2Basal leaves cordate or sagittate at base; pappus longer than achene 1. sibirica