Banisteriopsis maguirei B.Gates

Authority

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

Family

Malpighiaceae

Scientific Name

Banisteriopsis maguirei B.Gates

Type

Type. Maguire & Politi 28323, Venezuela, Amazonas, Cerro Sipapo, fl (holotype, MICH; isotypes, MICH, NY).

Description

Species Description - Liana, branches golden-appressed-sericeous, sometimes glabrate. Stipules minute. Leaves opposite or subopposite, very coriaceous, with the petiole 5-14 mm long, appressed-sericeous, eglandular, with the lamina 4.5-12.2 cm long, 2.3-10.0 cm wide, those associated with the inflorescence much smaller and usually reduced to bracts, ovate to orbicular, cordate at the base, obtuse to apiculate at the apex, with the margin revolute and bearing minute glands on or near the margin and a single pair of sessile glands at the base of the lamina beside the midrib abaxially, glabrous adaxially, sparsely appressed-sericeous abaxially, the hairs with the trabecula 0.2-1.0 mm long, with the reticulation prominulous adaxially and prominent abaxially. Inflorescence composed of large axillary cymes, the branches up to 30 cm long, densely to sparsely appressed-sericeous, the hairs with the trabecula 0.5-1.3 mm long, with the reduced bract-like leaves of the inflorescence bearing a well-developed pair of glands at the base beside the midrib and no or tiny marginal glands, the flowers borne in racemes of up to 7 pairs of flowers or rarely 4-flowered umbels; bracts and bracteoles up to 1.0 mm long, acute at the apex, sparsely sericeous; pedicels sessile, 8-12 mm long, 0.4-0.6 mm in diameter, sparsely to densely appressed-sericeous. Sepals sparsely sericeous abaxially, glabrous adaxially, 2.0-3.0 mm long and 2.0-2.5 mm wide, rounded at the apex, the 4 lateral sepals Eglandular, the glands 1.4-2.0 mm long and 1.0-1.4 mm wide. Petals yellow, long-fimbriate, the claws sometimes red or orange, the 4 lateral petals reflexed between the sepals, with the claw 1.5-2.5 mm long, 0.3-0.4 mm wide, the limb 4.0-7.0 mm long and wide, orbicular, sometimes with orange median area, the antero-lateral petals larger and more concave than the postero-lateral petals, the posterior petal with the claw erect, 2.5-2.8 mm long, 0.7-1.0 mm wide distally, often canaliculate, the limb 3.5-5.0 mm long, 3.0-4.0 mm wide, broadly ovate to orbicular, the basal fimbriae gland-tipped. Stamens with the filaments 1.8-3.6 mm long, all nearly the same length, with the filaments opposite the styles (i.e. opposite the anterior sepal and postero-lateral petals) somewhat longer than the others; anthers with the locules glabrous, 0.6-1.0 mm long, the connectives opposite the 3 anterior sepals 1.0-1.2 mm long, 0.8-1.0 mm wide and 0.6-0.7 mm deep, enlarged and glandular, obovate, projecting 0.2-0.5 mm beyond the locules, those of the stamens opposite the petals and the posterolateral sepals 0.4-1.0 mm long, 0.4-0.6 mm wide, 0.2-0.6 mm deep, oblong, not glandular or glandular at the apex. Ovary 1.0-1.4 mm tall, anterior style 3.0-3.2 mm long, straight and erect, somewhat thicker than the posterior styles, the posterior styles 3.2-3.6 mm long, straight and subparallel or diverging, slender, stigmas capitate. Fruit with filiform carpophore up to 3 mm long, the nut 4-5 mm tall, 2-3 mm long, sericeous to glabrate, the hairs stiff and irritating with the trabecula 0.5-1.0 mm long, ridged, with the wing 18-25 mm long, 8-10 mm wide distally, 2-3 mm wide at the base, appressed-sericeous to glabrate, the hairs with the trabecula 1.0-1.3 mm long, the wing arising from the upper one-third of the distal margin of the nut.

Discussion

Collected in flower in December to May, and in fruit in December, February and May.

Distribution

Known only from the Guayana Highland in Venezuela at altitudes of 1300-1800 m.

Venezuela South America| Amazonas Venezuela South America| Bolívar Venezuela South America|