Perityle parryi A. Gray

Perityle parryi occurs in southern Presidio and Brewster counties. Atypical populations with pappus bristles resembling those of P. vaseyi and/or with ray florets present or absent may be found in western Presidio County.

Perennials or subshrubs, 10–75 cm (in rock crevices, or in soil); puberulent, villous, or rarely tomentose. Leaves: petioles 12–40 mm; blades usually cordate to subreniform, 8–40(–50) × 8–50(–60) mm, margins irregularly dentate, laciniate, or ± 3-lobed, seldom more divided. Heads borne singly or (2–3) in corymbiform arrays, 8–10 × 7–14 mm. Peduncles 10–70 mm. Involucres campanulate to hemispheric. Phyllaries 28–36, lanceolate to linear, seldom oblanceolate, 5–9 × 0.5–1.6 mm, apices acute to short- or long-attenuate. Ray florets usually 12–18 (sometimes 0 or 1–6 in plants from w Presidio County); corollas yellow, laminae oblong, 4–10 × 2–4 mm. Disc florets 60–100; corollas yellow, tubes 1–1.3 mm, throats tubular, 2.5–3.2 mm, lobes 0.4–0.6 mm. Cypselae linear-elliptic to narrowly oblanceolate, (2–)3–4 mm, margins usually prominently calloused (sometimes thin), usually densely ciliate, sometimes short-hairy; pappi 0 or of 1(–2) usually antrorsely, sometimes erectly or retrorsely barbellate, bristles (1–)3–4(–6) mm plus crowns of hyaline, laciniate scales. 2n = 34.

Laphamia parryi (A. Gray) Bentham & Hooker f.

Leptopharynx parryi (A. Gray) Rydberg
Perityle Parryi A. Gray, PI. Wright. 2: 106. 1853.
Laphamia Parryi Benth. & Hook.; Hemsl. Biol. Centr. Am. Bot. 2: 210. 1881.
A perennial with a woody base; stems viscid-pilose and glandular-puberulent; leaves alternate; petioles 1-2 cm. long; blades reniform or broadly cordate, glandular-puberulent, 2-3 cm. broad, dentate with broad teeth and somewhat lobed, 3-5-ribbed; pedimcles 2-5 cm. long; involucre about 8 mm. high, 8-10 mm. broad; bracts linear-oblanceolate, glandular-puberulent, acuminate; ligules yellow, 5-6 mm. long, linear-oblong; disk-corollas glandular-puberulent; tube 2 mm. long; throat trumpet-shaped, 3 mm. long; style-appendages attenuate-filiform; achenes linear-oblong, densely villous-ciliate; hairs equaling the squamellae of the pappus; awn solitary, barbellate-hispidulous, a little shorter than the disk-corolla.
Type locality: Canon of the Rio Grande [Texas]. Distribution: Texas and Chihuahua.

Perityle parryi là một loài thực vật có hoa trong họ Cúc. Loài này được A.Gray mô tả khoa học đầu tiên năm 1853.