Tapura juruana (Ule) Rizzini

  • Authority

    Prance, Ghillean T. 1972. Dichapetalaceae. Fl. Neotrop. Monogr. 10: 1-84. (Published by NYBG Press)

  • Family

    Dichapetalaceae

  • Scientific Name

    Tapura juruana (Ule) Rizzini

  • Type

    TYPE. Ule 5172, Brazil, Amazonas, Rio Jurua, fl (holotype B, lost; photos, F, MO, NY; isotypes, G, HBG, K, L, MG, RB 20716).

  • Synonyms

    Gonypetalum juruanum Ule

  • Description

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    Description - Tree to 20.0 m tall, the young branches shortly tomentellous, soon becoming glabrous. Leaves oblong, chartaceous, 6.0-16.0 cm long, 2.2-4.5 cm broad, acuminate at apex, the acumen 8.0-15.0 mm long, subcuneate and slightly unequal at base, sparsely appressed hirsutulous beneath; midrib impressed above, prominent and appressed pubescent-glabrescent beneath; primary veins 12-17 pairs, arcuate, anastomosing; petioles 5.0-12.0 mm long, shortly tomentellous when young, canaliculate. Stipules lanceolate, ca 2.0 mm long, pubescent, subpersistent. Flowers hermaphrodite, sessile, borne in 2 short clustered cymules inserted on upper portion of petioles, the peduncles 1.0-4.0 mm long, tomentellous; bracteoles ca 0.5 mm long, ovate, persistent, pubescent. Calyx 3.0-4.0 mm long, gray-puberulous on exterior, the lobes unequal. Corolla exceeding calyx lobes, with 2 large bicucullate lobes and 2 smaller simple lobes, the larger lobes free almost to base, the other lobes and filaments united into a small tube, the tube glabrescent on exterior, filled by a dense lanate mass of hair within. Fertile stamens 3, alternating with corolla lobes and inserted on short corolla tube, 2 staminodes present. Ovary 3-locular, tomentose on exterior. Style with a trifid apex, sparsely pubescent. Fruit ellipsoid, ca 1.5 cm long, unilocular; epicarp with a dense compact pubescence; endocarp very thin, hard, bony, glabrous within.

  • Discussion

    This species is easily recognized by the pedunculate inflorescence inserted on the petiole. Like the preceeding species it is a much larger tree than other members of the genus.

    Flowering February to September.

  • Distribution

    Periodically flooded forest and beside rivers in western Amazonia.

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