Chamaemelum Miller

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 : 165

59. Chamaemelum Miller 1

Annual or perennial herbs. Leaves 1- to 3-pinnatisect, alternate. Capitula medium, pedunculate. Involucral bracts in 2 to several rows, gradually decreasing in size outwards. Receptacle hemispherical to conical, with scales. Outer florets usually ligulate, female or sterile; ligulate florets with a compressed, 2-winged tube and white, patent, entire or minutely 2- to 3-dentate ligule; inner florets hermaphrodite, tubular, yellow, the tube saccate at base and enclosing the apex of the achene. Achenes slightly compressed, weakly striate on inner face; pappus absent.

1 Most of the cauline leaves 1-pinnatisect 2. mixtum 1 Most of the cauline leaves 2- to 3-pinnatisect

2 Perennial; involucral bracts greenish or hyaline; receptacular scales hyaline 1. nobile 2Annual; involucral bracts and receptacular scales with dark brown margin and apex 3. fuscatum