Banisteriopsis lyrata B.Gates

  • Authority

    Maguire, Bassett. 1978. The botany of the Guayana Highland--part XI. Mem. New York Bot. Gard. 32: 1-391.

  • Family

    Malpighiaceae

  • Scientific Name

    Banisteriopsis lyrata B.Gates

  • Description

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    Species Description - Woody vine, the stems sericeous to glabrate. Leaves with the lamina 6-12.8 cm long, 2.9-6.5 cm wide, narrowly elliptical to elliptical or ovate, rounded or cordate at the base, obtuse to acute at the apex, glabrous above, densely and persistently sericeous below, the vesture more or less shining and golden; petiole 6-10(-20) mm long, golden-sericeous, with a pair of prominent glands at the apex; Stipules triangular, minute. Inflorescence axillary, paniculate, the branches bearing 3-4 pairs of flowers, sparsely to densely tomentose-sericeous, the bracts and bracteoles 1-1.5(-2) mm long, broadly triangular, appressed, persistent. Pedicel 6-10 mm long, sessile, densely to sparsely sericeous. Sepals abaxially sericeous throughout or glabrous distally, adaxially glabrous, rounded at the apex, the lateral 4 biglandular, the glands 0.8-2 mm long. Petals yellow, glabrous, longfimbriate, the lateral 4 with the claw 1-2 mm long, the limb 6-10 mm long, 4.5-7 mm wide, broadly elliptical, plane, the antero-lateral pair somewhat larger; posterior petal with the claw 3 mm long, constricted at the apex, the limb 5-8 mm long, 3.5-5 mm wide, obovate, with 2-3 prominent gland-tipped teeth proximally. Filaments opposite the 3 anterior sepals and the postero-lateral petals 3.4-4.4 mm long, longest opposite the postero-lateral petals, the other filaments 1.8-2.6 mm long, the posterior 3 inflexed between the posterior styles; anthers with the locules 0.6-1 mm long, glabrous, the connectives ofthe stamens opposite the 3 anterior sepals broadly obovate, much enlarged and glandular, 0.9-1.3 mm long, 0.7-1.1 mm wide, exceeding the locules by 0.2-0.7 mm. Styles glabrous, the anterior 2.4-3.4 mm long, straight and erect, the posterior 2 lyrate, 3-4.2 mm long, much longer than the anterior, slender, the stigmas capitate. Fruit unknown.

  • Discussion

    Type. Prance et al 6960, vicinity of Santa Barbara, 15 km E of Km 117 on Porto Velho to Cuiaba highway, Rondonia, Brazil, Aug flr (holotype INPA, isotypes MICH, NY).

  • Distribution

    Distribution. Southern Venezuela and Amazonian Brazi. VENEZUELA. Bolivar: Campamento Forestal "Potreritos," Reserva Forestal La Paragua, Feb flr, Blanco 676 (MY); Rio Asa, Reserva Forestal La Paragua, Feb imm flr, Blanco 715 (NY); La Prision, Medio Caura, elev 100 m. Mar flr, LI. Williams 11627 (F, MICH, US, VEN). BRAZIL. Para: Rio Jarí, estrada que liga Monte Dourado a Caracurú, terra firme, Nov flr, Oliveira 3501 (IAN, MICH, NY); estrada entre Planalto A e Tinguelin, Km 21, Dec flr, TV. T. S

    Venezuela South America| Brazil South America|