Cal cupuliform, the upper part usually prolonged into 5 setae; involucel 8-ribbed and cylindric below, expanded above into an orbicular or funnelform, scarious corona with many (sometimes excurrent) veins; cor with short tube and 5 unequal lobes, the marginal ones usually enlarged and subradiate; herbs with long-pedunculate heads and 1-3 rows of herbaceous involucral bracts. 80, Eurasia, Afr.
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.