Monographs Details: Amphiachyris
Authority: Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.
Description:Genus Description - Heads radiate, the rays 7–12, pistillate and fertile; invol bracts strongly imbricate, glutinous, shining, with stramineous base and abrupt green tip; receptacle flattish or convex, alveolate and sometimes also pubescent; disk-fls 10–50, functionally staminate, without an ovary, the style-branches short, slender, short-hairy, not stigmatic; achenes clavate, hairy; pappus of the disk-fls of 5(–8) long, white, spatulate scales united to half-length, that of the rays a minute, toothed crown or several short, ± concrescent scales; taprooted, glabrous annuals with alternate, narrow, entire, punctate lvs and numerous small yellow heads in a ± flat-topped infl. 2, N. Amer.