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(Last Modified On 2/7/2013)
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(Last Modified On 2/7/2013)
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Genus
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DIALYANTHERA Warb.
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PlaceOfPublication
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Ber. Deutsch. Bot. Ges. 13: 83. 1895
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Description
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Dioecious trees often with reddish sap, the younger branchlets pubescent. Leaves alternate, glabrous above, strigillose below with 2- to few-branched hairs, charta- ceous or subcoriaceous, petiolate, exstipulate, the tertiary veins obscure. Staminate fascicles in subspicate racemes or subcorymbose, the axes pubescent with few- branched hairs; bracts and bracteoles inconspicuous or absent; flowers 2-40 per fascicle, the perianth deeply but tardily 3(-4)-parted; anthers 2-6, usually free to the base, shorter or longer than the column. Pistillate flowers 2-5 per fascicle, the tepals partially connate; ovary l-carpellate with a subsessile obscurely 2-cleft stigma. Fruits 1-4 per inflorescence, the ligneous pericarp dehiscing longitudinally into 2 valves; seed ellipsoid to globose, the aril laciniate.
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Habit
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trees
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Distribution
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A genus of six species, ranging from Costa Rica through Central America to Amazonian Peru and adjacent Brazil.
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Key
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a. Petioles winged to the base, 6-14 mm. broad; secondary veins 20-35 on either side; staminate pedicels 5-10 mm. long .........................1. D. LATIALATA. aa. Petioles narrowly if at all winged, 1-6 mm. broad; secondary veins 5-18 on either side; staminate pedicels 1-6 mm. long. b. Leaves 10-28 cm. long, 4-16 cm. broad, the secondary veins 8-18 on either side; staminate inflorescences subspicate, 3-15 mm. long, the perianth 3.0-4.5 mm. long; androecium 2.4-3.0 mm. long, the anthers attached dorsally at the base .........................................2. D. OTOBA. bb. Leaves 5-15 cm. long, 2.5-6.0 cm. broad, the secondary veins 5-10 on either side; staminate inflorescences subcorymbose, 1.0-2.5 cm. long, the perianth 1.5-3.0 mm. long; androecium 1.7-2.1 mm. long, the anthers attached dorsally near the middle.................................... 3. D. ACUMINATA.
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