Lemmon's Hawkweed

Plants 25–45(–100) cm. Stems proximally piloso-hirsute (hairs 3–6+ mm), distally piloso-hirsute (hairs 1–2+ mm) and stellate-pubescent. Leaves: basal 2–8+, cauline (0–)3–4+; blades elliptic to oblanceolate, 30–85 × 16–35 mm, lengths 2.5–5+ times widths, bases cuneate (basal) or clasping (cauline), margins entire or denticulate, apices obtuse to acute, faces piloso-hirsute (hairs 1–2+ mm). Heads 8–12(–25+) in ± paniculiform arrays. Peduncles stellate-pubescent. Calyculi: bractlets 9–12+. Involucres campanulate, 7–9+ mm. Phyllaries 13–18+, apices ± rounded to acute, abaxial faces stellate-pubescent. Florets 25–40; corollas whitish to pale yellow, 8–9 mm. Cypselae urceolate, 3.5–4.5 mm; pappi of 45–60+, white or stramineous bristles in 2+ series, 5–5.5+ mm.

Hieracium lemmonii A. Gray

Hieracium crepidispermum is a North American plant species in the tribe Cichorieae within the family Asteraceae. It is widespread across much of Mexico and found also in the US states of Arizona and New Mexico.

Hieracium crepidispermum is an herb up to 100 cm (39 in) tall, with leaves mostly in a rosette at the bottom. Leaves are up to 85 mm (3.3 in) long, sometimes with small teeth on the edges. One stalk will produce 8-25 flower heads in a flat-topped array. Each head has 25–40 white or pale yellow ray flowers but no disc flowers.