Hieracium megacephalum Nash

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.

Hieracium argyraeum Small

Hieracium megacephalum, the coastal plain hawkweed, is a North American plant species in the tribe Cichorieae within the family Asteraceae. It grows only in the southeastern United States, in Georgia, Florida, and the Carolinas.

Hieracium megacephalum is an herb up to 40 cm (16 in) tall, with leaves on the stem and also in a rosette at the bottom. Leaves are up to 120 mm (4.7 in) long, sometimes with teeth on the edges. One stalk can produce as many as 50 flower heads in a flat-topped array. Each head has 20–50 yellow ray flowers but no disc flowers.