Banisteriopsis pseudojanusia (Nied.) B.Gates

  • Authority

    Gates, Bronwen. 1982. Banisteriopsis, Diplopterys (Malpighiaceae). Fl. Neotrop. Monogr. 30: 1-238. (Published by NYBG Press)

  • Family

    Malpighiaceae

  • Scientific Name

    Banisteriopsis pseudojanusia (Nied.) B.Gates

  • Type

    Types. Dusen 9079, Brazil, Paraná, Turma, fl (lectotype, S). Dusén s.n. (17 Feb 1911), Brazil, Paraná, Desvio Ribas, fl (syntype, S).

  • Synonyms

    Banisteria pseudojanusia Nied.

  • Description

    Species Description - Liana, branches tomento-sericeous with mixed, sessile T- and Y-shaped hairs, the arms unequal. Stipules up to 1.5 mm long. Leaves with the petiole 7-11 mm long, golden-tomentose, Eglandular, the lamina 2.2-7.5 cm long, 0.8-2.2 cm wide, lanceolate, truncate at the base, acute to apiculate at the apex, with the margin revolute, adaxially sparsely appressed-sericeous, abaxially sericeous, smooth adaxially and with the lateral veins prominent adaxially. Inflorescence axillary, of single 4-flowered umbels, appressed-sericeous, the common peduncle bibracteate, up to 4 cm long; bracts and bracteoles 0.8-1.5 mm long, broadly triangular, papery, glabrous, involucrate, persistent; pedicels sessile, 12-15 mm long, 0.4-0.5 mm in diameter, glabrous. Sepals 1.8-3.0 mm long, 1.8-2.5 mm wide, broadly elliptic, rounded at the apex, glabrous on both sides, the 4 lateral sepals Eglandular, projecting 0.6-1.4 mm beyond the glands, the glands 1.2-2.6 mm long, 0.9-1.3 mm wide, elliptic. Petals yellow, glabrous, fimbriate, eglandular, orbicular, the 4 lateral petals with the claw 0.8-2.0 mm long, the limb 4.0-7.5 mm long, 4.0-7.0 mm wide, the antero-lateral petals larger and more concave than the postero-lateral petals, the posterior petal with the claw erect, 2.2-3.0 mm long, 0.8-1.2 mm in diameter, constricted at the apex, the limb 4.0-6.0 mm long and wide. Stamens 10, or sometimes 9 by abortion, with the filaments 1.6-3.2 mm long, those opposite the sepals somewhat longer than those opposite the petals; anthers with the locules 0.8-1.2 mm long, glabrous, the connectives 0.7-1.0 mm long, 0.5-0.7 mm wide, 0.2-0.6 mm deep, elliptic, not overtopping the locules. Ovary 0.8-1.4 mm tall, sparsely sericeous to glabrous, the styles subequal, 2.0-2.4 mm long, diverging apically, stigmas capitate. Fruit unknown.

  • Discussion

    Collected in flower in January and February.

    This species resembles Banisteriopsis parviglandula in the size and shape of its leaves, but can be readily distinguished by its inflorescences of single umbels, and its much larger flowers with large calyx glands, and stamens and styles subequal. It resembles Janusia superficially in the form of its leaves and its inflorescences of single axillary umbels.

  • Distribution

    In woods in southern Paraná and Santa Catarina, Brazil.

    Brazil South America| Paraná Brazil South America| Santa Catarina Brazil South America|