Eupatorium 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 : 109

1. Eupatorium L. 2

Perennial herbs or shrubs. Leaves usually opposite. Capitula in terminal corymbs or panicles. Involucral bracts in few rows. Receptacle flat or convex, without scales. All florets tubular, hermaphrodite, 5-lobed or -dentate, white, pink or purplish. Achenes oblong or fusiform, 5-angled, truncate at apex; pappus hairs in 1 row, denticulate.

Stems and petioles puberulent but eglandular; leaves usually 3- to 5-fid 1. cannabinum 1 Edit. T. G. Tutin. a By T. G. Tutin. 3 By A. Hansen. Stems and petioles densely glandular-pubescent; leaves simple 2. adenophorum