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Datura L.
曼陀羅屬
Annual or perennial herbs or shrubs, fetid; pubescence of simple, sometimes glandular hairs. Leaves simple, entire or sinuate-dentate, petiolate. Inflorescences solitary flowers in leaf axils or in branch forks; peduncle, bracts, and bracteoles absent; pedicel often stout. Flowers radially symmetric, large; calyx tubular, often circumscissile near the base; corolla purple or white, funnelform, the lobes sometimes cuspidate; stamens equal, inserted below the middle of the corolla tube, anthers free, basifixed, mostly elongate, dehiscing longitudinally; ovary 2 locular. Fruit a dry capsule, globose to oblong, 4-valved or irregularly dehiscent, prickly or unarmed, often subtended by persistent calyx remnants; seeds numerous, somewhat compressed laterally, often with a conspicuous caruncle; embryo curved.
A genus of about 11 species centered in Mexico. Two species in Taiwan.
Hammer, K. A. Romeike & C. Tittel. 1983. Vorarbeiten zur monographischen Darstellung von Wildpflanzensortimenten: Datura L., sectiones Dutra Bernh., Ceratocaulis Bernh, et Datura. Kulturpflanze 31: 13-75.
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KEY TO SPECIES
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Pubescence evident, of erect, glandular hairs; leaves entire, sinuate or with mostly rounded lobes; corolla single, white with green veins, the teeth 10 in 2 series; fruit with dense, slender pubescent prickles, the calyx remnant flaring or reflexed. |
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Datura inoxia |
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Pubescence mostly inconspicuous, of eglandular hairs; leaves mostly with pointed lobes; corolla often double or triple, white, blue or reddish, the veins not conspicously green, the teeth 5-9 in one series; fruit with glabrous bumps or conical prickles, the calyx remnant applied tothe capsule. |
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Datura metel |
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Lower Taxa
Related Synonym(s):
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Treatments in Other Floras @ www.efloras.org
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