Annual, biennial or perennial herbs, branching. Hairs simple, glandular and eglandular. Leaves basal and cauline. Inflorescences paniculate. Capitula pedunculate or sub-sessile; involucral bracts biseriate; basal portion of inner bracts hardened and erect at maturity. Florets: ligule violet-blue or blue, rarely white or pink. Achenes homomorphic, not compressed, beakless. Pappus of scales, persistent; scales uniform within pappus.
Fls all ligulate and perfect, blue (pink or white); invol bracts biseriate, the outer shorter; achenes glabrous, striate-nerved, sub-5-angled, or the outer slightly compressed; pappus of 1–2 series of scales, sometimes minute; branching, leafy-stemmed, lactiferous herbs with alternate, entire to pinnatifid lvs and several showy heads. 9, mainly Europe and Medit. reg.