Aster novi-belgii, L.

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 : 114

7. A. novi-belgii L. , Sp. Pl. 877 (1753)

( A. brumalis Nees ).

Stem 40-120 cm. Leaves ovate-lanceolate to linear-lanceolate, (3-)4-10 times as long as wide, auriculate at base, remotely toothed. Capitula in a symmetrical, sometimes corymbiform, panicle. Involucral bracts acute, the longest 5-5-7 mm, the outer as long as the inner and largely herbaceous, lax or with a recurved apex, shortly tapered. Ligules at least 1-5 mm wide, violet-blue or (in cultivars) white, violet or purple. In fens and on river-banks and railway-banks', also occurring on waste ground. Widely naturalized in C. & N. W. Europe. [Au Be Br Cz Da Ga Ge Gr Hb He Ho Hu It Ju No Po Rm?Rs Su.] (North America.) A. dumosus x novi-belgii , of garden origin, has stems usually 20-40 cm and unequal involucral bracts with short green apex. It may occur in the same area as 7.