Banisteriopsis sellowiana (A.Juss.) B.Gates
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Authority
Gates, Bronwen. 1982. Banisteriopsis, Diplopterys (Malpighiaceae). Fl. Neotrop. Monogr. 30: 1-238. (Published by NYBG Press)
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Family
Malpighiaceae
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Scientific Name
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Type
Type. Sellow II it. 234 (a. 1815), Brazil, Rio de Janeiro, between Rio and Campos, fl (holotype, B destroyed, fragment NY).
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Synonyms
Banisteria sellowiana A.Juss.
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Description
Species Description - Liana, branches glabrous, young branches smooth, terete, older branches minutely fissured with numerous prominulous lenticels. Stipules up to 1 mm long, triangular, glabrous, joined by an interpetiolar ridge. Leaves with the petiole 510 mm long, glabrous, eglandular or apically bearing a pair of protuberant glands, the lamina 4.1-11.4 cm long, 2.2-5.0 cm wide, elliptic, obtuse at the base, acute to short-acuminate at the apex, with the margin slightly revolute, usually bearing a gland at the base of the leaf beside the midrib on each side, glabrous on both sides, with the reticulation prominent on both sides. Inflorescence axillary or terminal, paniculate, minutely appressed-sericeous to glabrate, bearing reduced leaves bearing a pair of prominent glands at the base and abaxially appressed-sericeous, the side branches bearing 3-5 pairs of flowers; bracts and bracteoles 0.6-1.0 mm long, triangular, glabrous, involucrate, persistent; pedicels sessile or borne on a peduncle up to 1.5 mm long, 5-7 mm long, 0.2-0.4 mm in diameter, sparsely appressed-sericeous to glabrate. Sepals 1.8-2.6 mm long, 1.4-2.0 mm wide, broadly elliptic, rounded at the apex, glabrous on both sides, the 4 lateral sepals bearing glands 0.6-1.2 mm long and 0.5-0.7 mm in diameter, projecting 1.0-1.5 mm beyond the glands. Petals yellow, irregularly dentate, glabrous, eglandular, the 4 lateral petals reflexed between the sepals with the claw 1.0-2.0 mm long, the limb 5.0-7.0 mm long, 4.5-6.0 mm wide, rotund, the antero-lateral petals larger and more concave than the postero-lateral petals, the posterior petal with the claw erect, up to 2.8 mm long, the limb 4.5-5.5 mm long and 3.5-4.0 mm wide, obovate, plane. Stamens with the filaments 1.2-3.2 mm long, those opposite the 3 styles longest, those of the 3 posterior stamens shortest; anthers with the locules 0.4-1.0 mm long, glabrous, the connectives of the stamens opposite the 3 anterior sepals 1.0 mm long, 0.6-0.9 mm wide, 0.6-0.8 mm deep, obovate, glandular apically, the others 0.4-0.8 mm long, 0.2-0.4 mm wide, 0.1-0.3 mm deep, elliptic, eglandular. Ovary 1.0-1.4 mm tall, sericeous, the styles slender and subequal, 2.4-2.8 mm long, the anterior style directed anteriorly with the apex bent inwards, the posterior styles diverging from the base, hooked at the apex, stigmas truncate. Fruit of 3 samaras with filiform carpophore up to 1.5 mm long, the nut up to 5 mm tall and 3 mm long, reticulate, appressed-sericeous to glabrate, the hairs stiff and straight with the trabecula up to 1 mm long, bearing laterally on the upper distal margin of the nut a triangular crest 2-3 mm along its base and 1.5-3.5 mm tall, the wing 20-24 mm long, 9-11 mm wide, narrower towards the base, appressed-sericeous to glabrate like the nut. Sepals enlarging, up to 4 mm long, in fruit.
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Discussion
Collected in flower in October and in fruit in October.
Banisteriopsis sellowiana is distinguished from most members of the B. nummifera group by its glabrous leaves. It can be distinguished from glabrous-leaved individuals of B. nummifera by its inflorescence with shorter side branches (up to 1.5 cm) bearing fewer smaller flowers with small calyx glands and slender styles, and its fruit with a smaller nut bearing a lateral winglet, and with a more slender wing. Superficially, B. sellowiana resembles the B. martiniana group, but the reticulate secondary veins easily distinguish it from this group. -
Distribution
Only known from restingas near Rio de Janeiro, Brazil.
Brazil South America| Rio de Janeiro Brazil South America|