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(Last Modified On 4/8/2013)
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(Last Modified On 4/8/2013)
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Genus
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Aspidosperma Mart. & Zucc. in Mart.
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PlaceOfPublication
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Nov. Gen. & Sp. 1: 57. 1824.
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Synonym
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Cufodontia Woodson, Arch. Bot. Sist. 10: 39. 1934.
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Description
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Trees or shrubs, lacticiferous, the latex white or reddish. Leaves alternate, rarely opposite and decussate, or ternate, non-glandular, pinnately-nerved; mostly petiolate. Inflorescences cymose to aggregate dichasial and thyrsiform, axillary or terminal, sometimes extra-axillary, the secondary peduncles frequently fascicu- late in umbell-like form. Flowers small- to medium-sized; calyx 5-lobed, the lobes equal to conspicuously unequal, or rarely 4-lobed with the 2 outermost lobes con- nate and the 2 inner lobes free and included, without squamellae within; corolla salverform, tubular-salverform or tubular, the tube straight or inflated, ,terete or callose-angulate, the limb 5-lobed, sinistrorsely convolute; stamens 5, inserted midway or higher in the corolla tube, filamented, the anthers free and not agglu- tinated to the stigma, without an enlarged connective; gynoecium 2-carpellate, apocarpous, the ovary superior, the ovules numerous, rarely reduced to 2, with or without a low annular nectary, the style 1, the stigma ? clavate to subcapitate. Fruit apocarpous, of 2 follicles, + woody, mostly compressed, rarely cylindroid; seeds numerous, rarely reduced to 2, compressed, peltate, winged, the wing con- centric or eccentric.
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Habit
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Trees or shrubs
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Distribution
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About 50 species in Mexico, Central America, Hispaniola and Trinidad, and most of South America.
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Reference
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Woodson, R. E., Jr. Studies in the Apocynaceae. VIII. An interim revision of the genus Aspidosperma Mart. & Zucc. Ann. Missouri Bot. Gard. 38: 119- 206. 1951.
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Key
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a. Corolla tube strongly callose-angulate, the lobes -tightly spirally-contorted in bud ..................................................... 1. A. megalocarpon aa. Corolla tube essentially terete, the lobes erect or loosely spiral in bud.... 2. A. darienense
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