Banisteriopsis pubescens (Nied.) Cuatrec.
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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. Lehmann 5159, Colombia, Nariño, Tuquerres, fl (holotype, B destroyed, NY fragment; isotype, F).
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Synonyms
Banisteria elegans var. pubescens Nied.
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Description
Species Description - Liana, branches glabrous. Stipules minute. Leaves with the petiole 2-7 mm long, glabrous, eglandular or apically Eglandular, the lamina 7.0-15.0 cm long, 6.0-10.0 cm wide, smaller and often reduced to bracts in the inflorescence, broadly elliptic to rotund, strongly cordate at the base, apiculate at the apex, with the margin flat and bearing small glands, bearing abaxially at the base beside or on the midrib a pair of sessile glands, glabrous adaxially, sparsely appressed-sericeous, abaxially, the hairs with the trabecula 0.5-2.0 mm long, the reticulation prominulous adaxially and prominent abaxially. Inflorescence axillary, the branches up to 20 cm long, loosely brown-tomentose; the hairs with the trabecula 1.2-1.6 mm long, cymose, of 4-flowered umbels, the common peduncle up to 24 mm long, bracts and bracteoles up to 1.2 mm long, acute at the apex, abaxially sparsely tomentose, involucrate, persistent; pedicels sessile, 10-14 mm long, 0.6 mm in diameter, loosely tomentose. Sepals 2.0-3.0 mm long, 2.0-2.2 mm wide, elliptic, rounded at the apex, abaxially densely sericeous, adaxially glabrous, the 4 lateral sepals eglandular or Eglandular, the glands up to 1.2 mm long and 0.8 mm wide. Petals yellow, glabrous, lacerate, the 4 lateral petals reflexed between the sepals, the claw 1.0-2.5 mm long, 0.2-0.4 mm wide, the limb 5.0-9.0 mm long, 5.0-8.5 mm wide, rotund to orbicular, the antero-lateral petals larger and more concave than the posterolateral petals, the posterior petal with the claw erect 3.0-3.5 mm long, 0.5-1.0 mm wide distally, not constricted, the limb 4.0-5.5 mm long, 4.0-4.5 mm wide, obovate to orbicular, eglandular or with 1-2 glands at the base. Stamens with the filaments 1.8-3.0 mm long, those opposite the sepals longer than those opposite the petals; anthers with the locules 0.6-1.2 mm long, glabrous, the connectives of the stamens opposite the 3 anterior sepals 1.0-2.0 mm long, 0.8-1.2 mm wide, 0.8-1.2 mm deep, obovate, glandular apically and projecting up to 0.8 mm beyond the locules, those of the stamens opposite the petals and the posterolateral sepals 0.4-1.2 mm long, 0.4-0.6 mm wide, 0.2-0.6 mm deep, oblong, eglandular, not overtopping the locules. Ovary 1.0-1.4 mm tall, densely sericeous apically; styles equal, 3.0-3.4 mm long, straight and parallel throughout their length or hooked at the apex, stigmas truncate. Fruit unknown. Sepals enlarging, up to 5 mm long, after flowering.
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Discussion
In its flowers and inflorescence this species is similar to Banisteriopsis elegans, but can be distinguished by its short petiolate leaves which are strongly cordate at the base, its tomentose pedicels and sericeous sepals. Additional collections would no doubt further increase the size ranges for leaf and flower measurements.
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Distribution
Known only from the type locality Narino, Colombia, and two collections from adjacent Ecuador.
Colombia South America| Nariño Colombia South America| Ecuador South America|