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17. Datura Linnaeus, Sp. Pl. 1: 179. 1753.
曼陀罗属 man tuo luo shu
Shrubs or annual or perennial herbs; pubescence of simple sometimes glandular hairs. Leaves petiolate; leaf blade simple, entire or sinuate-dentate. Inflorescences solitary flowers in leaf axils or in branch forks; peduncle, bracts, and bracteoles absent. Flowers actinomorphic, large. Pedicel often stout. Calyx long tubular or cylindric, often circumscissile near base. Corolla elongated, funnelform; lobes sometimes cuspidate. Anthers mostly elongated, dehiscing longitudinally, included. Ovary 2-4-locular. Fruit a dry capsule, 4-valved or irregularly dehiscent, prickly or unarmed, often subtended by remnants of persistent calyx. Seeds numerous, laterally compressed; embryo curved.
About 11 species: North and South America, three species in China.
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| 1 |
Fruit erect, regularly 4-valved; calyx tube 5-angular; corolla less than 11 cm; seeds black; anthers less than 5 mm |
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1 Datura stramonium |
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Fruit horizontal or pendulous, irregularly 4-valved; calyx tube cylindric; corolla more than 11 cm; seeds brown; anthers more than 7 mm. |
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(2) |
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| 2 (1) |
Plants glandular pubescent; capsules densely gray-white pubescent with slender prickles |
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2 Datura inoxia |
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Plants glabrescent; capsules tuberculate or with stout-based prickles |
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3 Datura metel |
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Lower Taxa
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