Datura stramonium L., Sp. Pl. 179. 1753.
Hierbas anuales, hasta 1 m de alto, robustas, glabras; tallos a veces purpúreos. Hojas ovadas a deltoides, 820 cm de largo y 519 cm de ancho, ápice y lobos agudos o acuminados, base cuneada o acuminada, prominentemente sinuado-lobadas o dentadas; pecíolos 312 cm de largo. Pedicelos floríferos erectos, 46 cm de largo; cáliz 35 cm de largo, dientes deltoides, iguales; corola 69 cm de largo, lobos 5, blanca, azul o malva; anteras 34 mm de largo. Cápsula ovoide, erecta, 34 cm de diámetro, copiosamente cubierta de acúleos rígidos y puntiagudos, dehiscente desde el ápice; semillas sin carúncula, 34 mm de diámetro, negras.
Maleza común, en pastizales y orillas de caminos, zona norcentral; mayormente 10001300 m; fl y fr juldic; Stevens 9957, 10242; aunque se dice que es nativa de la India, es probablemente nativa de México pero actualmente está ampliamente distribuida.
Short-lived perennial or ephemeral herb, to 1 m tall, stems green or purplish. Leaves mostly repand-dentate, the teeth acuminate, the base often dimidiate, glabrate to pubescent with small, simple, multicelled, pulverulent hairs, the petioles less than half as long as the blades. Pedicels mostly erect, stout, 5-10 mm long. Flowers sometimes showy; calyx tubular, ca. 5 cm long, puberulent, slightly wider at the base, opening by 5 lanceolate-acuminate teeth ca. 5 mm long, circumscissile near the base leaving a distinct flange ca. 5 mm long; corolla showy, white (Panama) or purple, tubiform, 6-8 cm long, about twice as long as the calyx, the limb with 5 subulate 4-5 mm long teeth; anthers 3-4 mm long, ellipsoid. Fruit erect, ovoid, 2 cm long, covered-,with slender, stiff, ascending spines, 4-loculed, many seeded, dehiscing to near the base by the apical sutures.
"Coarse, heavy-scented, inconspicuously puberulent annual to 1.5 m, often divaricately branched; lvs petiolate, with large, coarsely few-toothed or sublobate blade to 2 × 1.5 dm; cal 3–5 cm, strongly prismatic and narrowly 5-winged, unequally 5-toothed, the persistent base 4–6 mm and spreading to reflexed; cor white or anthocyanic, 7–10 cm, the limb 3–5 cm wide, shallowly 5-lobed, each lobe with a slender, projecting tooth to 1 cm; fr erect, ovoid, 3–5 cm, generally covered with short prickles, the lower prickles often shorter than the upper (or the fr smooth); 2n=24. Dry soil and waste places; widespread in temperate and warm regions, perhaps of American origin. June–Aug. (D. tatula, with anthocyanic fls)"
Erect branched, annual with smooth stems 1-2 ft. or more high
Rather slender white (D. stramonium Linn. proper) or purple-violet (D. tatula Linn. proper) flowers. The flower-colour is of no taxonomic importance.
Stamens 5, white or purple, included; filaments adnate to above the middle of the corolla tube, with short, hyaline, occasionally glandular hairs, free upwards for 1.8–3.3 cm and ± glabrous; anthers (4)5–7.5(8) mm long, elliptic or ± oblong in outline.
Ovary up to 5 × 4 mm, pyramidal or ovoid, with ± long, fleshy appendages (or smooth outside the Flora Zambesiaca area), puberulent and glandular; style 3.5–6.8(7) cm long, straight, glabrous.
Calyx 2.5–5 × 0.4–1 cm, 5-angled to 5-ribbed, ± puberulent, more densely so towards the base and on the lobes, especially at the margins inside and out, drying with somewhat prominent longitudinal nerves, the tube little or not inflated and slightly wider at the base; lobes unequal, 4–10 × 2–4 mm, triangular to lanceolate, acute to long-acuminate or cuspidate; in fruit the flange up to 13 mm wide, reflexed.
Corolla white or faintly tinged purple, sometimes becoming purple or violaceous in the tube, (4)6–10(11) cm long, narrowly tubular-infundibuliform, simple, glabrous or with a few short hairs scattered especially along the longitudinal nerves; tube filling the calyx for ± half or more of its length, with a few minute and short hairs scattered mainly below on the staminal region within; limb (1.5)3–7.5 cm across, 5(6)-lobed; lobes triangular or ovate, narrowing into a long-acuminate tip up to 15 mm long, spreading or recurved.
Flowers solitary, inserted in the forks of the branches, erect; pedicel 5–15 mm long, slender to ± stout, ± puberulent, in fruit elongating to 30 mm and stout.
Leaves solitary, occasionally geminate; petiole 1–9.5 cm long; lamina membranous or papyraceous, 3.5–20 × 1–15.5 cm, ovate or rhombic-ovate to elliptic or ± oblong to ± lanceolate, base cuneate to ± rounded, truncate or ± cordate, occasionally attenuate, and often dimidiate, sometimes decurrent into the petiole, apex ± acute or acuminate, coarsely and sharply incised-dentate to repand-dentate with irregular, obtuse to acuminate teeth, rarely ± entire, at first minutely pubescent, later sparsely so, more densely towards the base, at or near the margins and on the nerves, to ± glabrous, the lateral nerves extending to the margin.
Branches striate and ± sulcate, ± glabrous or with ± sparse hairs, more abundant on the young parts and near the nodes, and often glandular.
Seeds dark brown to black, 3.5–4.5 × 2.5–3.3(3.5) × 1.2 mm, ± reniform, strongly thickened and alveolate at the border, finely pitted; caruncle very small, fleshy.
Erect, usually ± dichotomously branched, annual, biennial or more rarely short-lived perennial herb, sometimes ± bushy, less often a shrub, 0.2–1.5(2) m high, unpleasantly scented, green or tinged purple or violet.
Fruit upright, yellowish to brown when ripe, 2.5–5 × 2–4.5 cm including spines, subglobose or ovoid to ± ellipsoid, thick-walled, densely covered with many, rather slender to occasionally stout, stiff, ascending, subequal or unequal spines up to 16 mm long (rarely unarmed elsewhere), puberulous, less abundantly on the spines, regularly breaking up downwards (and bearing a strikingly developed false dissepiment).
Annual herb, up to 1.5 m high. Pedicels 5 mm long. Calyx 40 mm long. Corolla up to 100 mm long. Fruit over 30 mm in diameter, covered with spreading spines up to 10 mm long. Flowers white, mauve or purplish.
Annual herb, up to 1.5 m high; robust. Leaves petiolate; blade ovate, up to 200 mm long, margins coarsely and irregularly toothed, veins prominent, upper surface dark green or purple, paler below. Flowers: solitary; pedicels 5 mm long; calyx up to 40 mm long; corolla up to 100 mm long, with 5 prominent teeth on rim, white, mauve or purplish; Oct.-Mar. Fruit an ovoid capsule, up to 50 x 30 mm, covered with slender, spine-like outgrowths of unequal length, up to 10 mm long.
Vredefort Dome Savanna; Kalahari Deciduous Acacia-wooded Grassland; Dry Grassland; Mesic Grassland; Dwarf Karroid Shrubland; Zastron Moist Grassland. Disturbed places, weed.