Hieracium gronovii L.
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.
Species Description - Stems mostly solitary on a crown or short, praemorse rhizome, 3–15 dm, conspicuously spreading-hairy toward the base, the hairs rarely approaching 1 cm, becoming merely strigose-puberulent or obscurely stellate to subglabrous upward, sometimes also finely glandular; lvs finely stellate and usually also ± long-hairy, the basal or lowest cauline ones broadly oblanceolate to obovate or elliptic, 4–20 cm (including the usually short petiole) × 1–2.5 cm, deciduous or persistent, the cauline ones progressively reduced upward, soon becoming sessile and commonly somewhat clasping, the upper part of the stem naked or nearly so; infl ± elongate and openly cylindric, at least in well developed plants; the peduncles puberulent and sparsely to fairly copiously long-stipitate-glandular; invol 6–9 mm; fls 20–40; achenes 2.5–4 mm, distinctly narrowed toward the top; 2n=18. Dry, open woods, especially in sandy soil, sometimes fields and pastures; Mass. to Fla., w. to s. Ont., Kans., and Tex. July–Oct.