Tyrimnus (Cass.) 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 : 244

124. Tyrimnus (Cass.) Cass. 2

Slender, erect, lanate annual or biennial herbs. Leaves alternate. Capitula solitary, on long, naked peduncles. Involucre hemispherical; involucral bracts imbricate, appressed, entire, mucronate-spinose. Receptacular scales numerous, setaceous. Inner florets hermaphrodite; outer florets usually sterile. Corolla purplish-pink, rarely white, regularly 5-fid, with a short tube. Achenes oblong, tetragonal, compressed, glabrous; pappus of many rows of white hairs which are minutely scabrid distally.