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Acourtia runcinata (D. Don) B. L. Turner Phytologia. 38: 460. 1978.

Featherleaf desertpeony

Plants 5–35 cm. Leaves basal; petioles 0.5–9 cm; blades oblong-oblanceolate, 2.5–23 cm, bases cuneate, margins pinnately lobed (lobes ovate), spinulose-dentate, apices acute, faces hirtellous and/or finely stipitate-glandular. Heads borne singly or 2–3 together (on scapiform peduncles). Involucres turbinate, 14–17 mm. Phyllaries in 2–4 series, lanceolate to subulate (3–15 mm), margins glandular-hairy, apices acuminate, abaxial faces glandular. Receptacles reticulate, hispidulous. Florets 25–53; corollas pink or lavender-pink, 12–22 mm. Cypselae fusiform to linear-fusiform, 4–8 mm, stipitate-glandular and/or hispidulous; pappi tan or white, 1–17 mm. 2n = ca. 54.

Flowering year round (mostly Mar–Aug). juniper forests , oak woodlands , dry matorral , desert scrub on calcareous , sandy clay , and gypsiferous soils ;0–1600 m;Tex.;Mexico (Chihuahua).Mexico (Coahuila).Mexico (Hidalgo).Mexico (Nuevo León).Mexico (San Luis Potosí).Mexico (Tamaulipas).

Acourtia runcinata is the most widespread species of the genus, within which it is unique in possessing fasciculate, tuberous-fusiform roots. In the flora, it grows in central and southwestern Texas.