Adapted from Barclay (1959) New considerations in an old genus: Datura. Botanical Museum Leaflets, Harvard University 18: - 245-272
Plants herbs, to 80+ cm tall, dichotomously branching; branches strigose when young, becoming glabrous with age. Leaves alternate; petioles to 4.8 cm long, puberulent; blades ovate-lanceolate, to 8+ cm long, 4-6 cm wide, surfaces glabrous except veins sparsely strigose,bases unequal, margins irregularly lobate-dentate, tips acute. Flowers axillary, erect, pedicellate; pedicels about 1 cm long at anthesis, becoming up to 2.2 cm long and reflexed in fruit; calyces 1.7-2 cm long, 0.5 cm wide at the base. glabrous, 5-amgled 5-toothed, the upper portion dehiscing in fruit; corollas up to 9.5 cm long, funnelform, plicate, glabrous externally. pubescent internally from base to the base of the filaments, with 5 sets of 3 veins, each set terminating in a setiform tooth about 5 mm long and 2 mm wide at the base; stamens about 2.8 cm long, attached about 3 m above the corollas bases; filaments glabrous except near their attachment to the colrollas; anthers about 6 mm long, with filamentous trichomes along the lines of dehiscences; styles to 7.8 cm long. Fruits capsules on recurved pedicels, surrounded by calyx bases up to 1.3 cm long; capsules globose, about 2 cm long, surface puberulent, covered with sharp, stiff, prickly, glabrous spines, dehiscing irregularly; seeds reniform, about 5 mm long, 4 mm wide, with lunate lacunae on the lateral face and a triple-ridge along the convex edge.
Datura reburra is endemic to Mexico Even there, it is narrowly distributed and apparently poorly known. GBIF contains no collections made since 1984 and there are no images on iNaturalist. It is most similar to D. discolor but differs from that species in having puberulent fruits with glabrous spines, triple-ridged seeds, and small flowers.