Anthodiscus obovatus Benth. ex Wittm.
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Authority
Prance, Ghillean T. & Frietas Da Silva, Marlene. 1973. Caryocaraceae. Fl. Neotrop. Monogr. 12: 1-75. (Published by NYBG Press)
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Family
Caryocaraceae
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Scientific Name
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Type
TYPE. Spruce 3146, Venezuela, Terr. Amazonas, San Carlos de Rio Negro, fl fr (holotype, B lost; photos, F, MO, NY; lectotype, K; isotypes, BM, BR, C, CGE, E, F, G, GH, GOET, LD, LE, OXF, P).
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Description
Description - Small tree to 8.0 m tall, the young branches puberulous-glabrescent. Leaves trifoliolate; petioles 0.5“ 3.0 cm long, terete, glabrescent; leaflets petiolulate, the terminal petiolule 8.0-15.0 mm long, the lateral petiolules much shorter than the terminal one, the petiolules glabrescent, canaliculate; the laminas oboavate-orbicular, slightly asymmetrical, coriaceous, shortly mucronate at apex, the mucro 0.5-3.0 mm long, cuneate at base, entire and slightly revolute at margins, glabrous on both surfaces, the terminal lamina 8.0-11.5 cm long, 5.0-8.0 cm broad, the lateral laminas smaller than the terminal one; midrib impressed and glabrous above; primary veins 9-10 pairs, prominulous above, prominent and glabrous beneath; stipels absent. Stipules lanceolate, to 5.0 mm long, membraneous, caducous. Peduncles 1.5-5.5 cm long, terete, puberulous-glabrescent, not conspicuously lenticellate. Inflorescences elongate racemes, ca 40-50-flowered, the rachis 6.0-13.0 cm long, puberulous; flowering pedicels 5.0-8.0 mm long, puberulous-tomentellous, ebracteolate. Bracteoles at base of pedicel, lanceolate, membraneous, persistent, ca 5.0 mm long. Calyx broadly cupuliform, ca 2.5 mm long, puberulous-tomentellous on exterior, 5 pointed. Corolla ca 6.0 mm long, the lobes 5, often remaining attached at apex to form a calyptra, and circumscissile at base, yellow. Stamens numerous, ca 130, the filaments free almost to base, 5.0-11.0 mm long, yellow, the apical portion tuberculate, the anthers small. Ovary globose, glabrous on exterior, ca 12 locular. Styles 11-12, ca 3.0 mm long, glabrous. Fruit flattened-globose, ca 10.0 mm broad, 7.0 mm long, slightly ribbed longitudinally but not pointed, 10-11-locular; exocarp glabrous, slightly ridged; pericarp thick, hard, the interior glabrous.
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Discussion
USES. The bark used as an ingredient of the Strychnos based arrow poison of the Tukanos Indians.
Collected in flower April to January, but mostly August to November.
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Distribution
Caatinga forests and river banks in the upper Rio Negro region and extending to the State of Bolivar, Venezuela.
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