1. Oxalis dichondrifolia A. Gray, Smithsonian Contr. Knowl. 3(5): 27. 1852. (as dichondraefolia).
Peony-leaf wood-sorrel, agrito Peony-leaf wood-sorrel, agrito
Monoxalis dichondrifolia (A. Gray) Small
Herbs perennial, caulescent, <caudex present>, rhizomes and stolons absent, bulbs absent, <taproot sometimes with tuberlike portions>. Aerial stems mostly 1–3 from base, erect, 5–20(–30) cm, becoming woody proximally, finely hirtellous-villous. Leaves cauline; stipules <brownish>, linear-setiform, margins without flanges, apical auricles absent; petiole (0.5–)1–3 cm; leaflet 1, dull gray-green, suborbiculate to oblong-obovate or ovate, 5–37 mm, not lobed, <apex concave or truncate to retuse and apiculate>, surfaces strigose-hirsute, oxalate deposits absent. Inflorescences 1-flowered, <axillary at distal nodes>; peduncles 15–25(–50) cm. Flowers heterostylous; sepal apices without tubercles; petals yellow to orange-yellow, 11–13 mm. Capsules broadly cylindric, 5–8(–10) mm, densely pilose.
Flowering Feb–Jun, sporadically year-round. Gravelly hills, clay dunes, limestone slopes, calcareous marl, sand, sandy loam, sandy silt, alluvial soils, brushlands, mesquite thickets, chaparral, roadsides, fields, ditch and river margins; 0–500 m; Tex.; Mexico (Coahuila, Nuevo León, San Luis Potosí, Tamaulipas, Veracruz).
Oxalis dichondrifolia is fairly widespread in southern Texas.