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36. Apocynum Linnaeus, Sp. Pl. 1: 213. 1753.
罗布麻属 luo bu ma shu
Poacynum Baillon; Trachomitum Woodson.
Herbs perennial, sometimes shrubs, latex white. Rhizomes fibrous. Leaves opposite, rarely alternate, margin denticulate. Inflorescences thyrselike, terminal. Corolla campanulate or basin-shaped; throat wide, open; lobes overlapping to right. Stamens inserted at base of corolla tube, alternate with corona lobes; anthers adherent to pistil head; disc scales fleshy. Ovary half-inferior; carpels 2, free; ovules numerous in each locule. Follicles 2, slender, divaricate. Seeds numerous, apically comose; embryo straight, cotyledons as long as radicle.
Nine species: temperate regions of North America, Europe, and Asia; two species in China.
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Corolla campanulate, deeper than wide; leaves usually opposite |
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1 Apocynum venetum |
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Corolla basin-shaped, wider than deep; leaves usually alternate |
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2 Apocynum pictum |
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Lower Taxa
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