Tragopogon pratensis L.
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.
Species Description - Mostly biennial, 1.5-8 dm; lvs elongate, to 30 × 2 cm, rather abruptly narrowed a little above the base, and tending to have the margins somewhat crisped, cirrhose-recurved at the tip, slightly floccose when young, soon glabrous; peduncles not enlarging in fl and scarcely so in fr; invol bracts typically 8, 12-24 mm in fl, equaling or shorter than the chrome- yellow rays, elongating to 18-38 mm in fr; achenes 15-25 mm, rather abruptly contracted to the slender, relatively short beak, the body not much shorter than in our other spp.; pappus whitish; 2n=12. Roadsides, fields, and waste places, commonly in slightly moister habitats than no. 2 [Tragopogon dubius Scop.]; native of Europe, now widely established in our range and westward. May-Aug.