Hieracium megacephalum Nash (redirected from: Hieracium megacephalon)
Family: Asteraceae
[Hieracium argyraeum Small,  more...]
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Plants ca. 40 cm. Stems proximally piloso-hirsute (hairs 1-4+ mm) and stellate-pubescent, distally piloso-hirsute and/or stellate-pubescent. Leaves: basal 4-6, cauline (1-)3-4+; blades elliptic to obovate, 35-80(-120) × 15-30(-40+) mm, lengths 2-4+ times widths, bases cuneate to rounded (sometimes ± clasping), margins entire or denticulate, apices rounded to obtuse, abaxial faces piloso-hirsute (hairs 1.5-4 mm), sometimes stellate-pubescent as well, adaxial piloso-hirsute. Heads (12-)20-50+ in open, corymbiform arrays (lengths of arrays ± 2 times diams.). Peduncles stellate-pubescent and stipitate-glandular. Calyculi: bractlets 5-12+. Involucres campanulate, 8-11 mm. Phyllaries 9-13+, apices acute to acuminate, abaxial faces stellate-pubescent and stipitate-glandular. Florets 20-50+; corollas yellow, 10-12+ mm. Cypselae urceolate, 3.5-4+ mm; pappi of 32-40+, white to stramineous bristles in 1-2+ series, 5-6.5 mm.

Flowering (Jan-)Apr-May(-Oct). Limestone hammocks, pine woods, sands; 0-10+ m; Fla., Ga., S.C.