Leafy Rockdaisy

Plants 4–25(–35)+ cm (profusely branched, leafy); hirsute, pilose, or puberulent. Leaves: petioles 3–13 mm; blades ovate, subcordate, subdeltate, or subreniform, 5–17(–22) × 5–17(–30) mm, margins almost entire to irregularly serrate or serrate-lobed (faces pilose to hirsute). Heads borne singly or in corymbiform arrays, 6–8 × 3–5 mm. Peduncles 2–13(–20) mm. Involucres subcylindric, subfunnelform, or narrowly campanulate. Phyllaries 8–10(–14), narrowly lanceolate to oblanceolate, 3.5–7 × 1–2 mm. Disc florets 8–16; corollas yellow or white, tubes 0.8–1.3 mm, throats tubular to subfunnelform, 1.8–3 mm, lobes 0.5–1.3 mm. Cypselae (1.8–)2–2.5 mm; pappi of (16–)20–30 bristles 1–3(–3.5) mm.

Laphamia rupestris A. Gray, Smithsonian Contr. Knowl. 3(5): 100, plate 9, fig. A. 1852; Pappothrix rupestris (A. Gray) Rydberg

Pappothrix rupestris (A. Gray) Rydberg
Laphamia rupestris A. Gray, PI. Wright. 1: 100. 1852.
A perennial with thick woody caudex; stems diffuse, about 1 dm. high, subviscid-pubescent ; leaves opposite and alternate, petioled; blades pubescent and glandular-granuliferous, rounded or deltoid, dentate to deeply laciniate, 1-1.5 cm. long; heads at the ends of short leafy branches; involucre cylindric, about 6 mm. high and 4 mm. broad; bracts oblong-oblanceolate. puberulent and ciliate; rays wanting; corollas of the disk-flowers ochroleucous (?); tube 1 mm. long; throat nearly cylindric, 3 mm. long; achenes narrowly oblong, hirsutulous, 2.5 mm. long, with thickened margins; pappus of about 20 subulate, barbellate awns.
Type locality: Pass of the Limpia, Texas.
Distribution: Western Texas.