Martinella obovata

Description. Lianas; branches with solid pith, cylindrical, green, drying brown, smooth, puberulent, covered with few stipitate glandular trichomes, with scattered patelliform glandular trichomes more frequently at interpetiolar region; prophylls of the axillary buds covered with simple eglandular trichomes. Leaves 2 - foliolate, with the terminal leaflet generally modified into a trifid tendril; petioles terete, not pulvinated, 8.5 - 66 mm long, covered with stipitate glandular trichomes, with few scattered patelliform glandular trichomes; petiolules terete, not pulvinated, 5 - 40.4 mm long, covered with stipitate glandular trichomes, with occasional patelliform glandular trichomes; leaflets discolor, with abaxial surface lighter than the adaxial surface (silver-like color), chartaceous, ovate, apex acuminate, base cordate, margins entire and slightly revolute, 7.9 - 13.2 x 3.0 - 9.4 cm, adaxial surface glabrous, with simple eglandular trichomes and stipitate glandular trichomes at canaliculi of veins, abaxial surface glabrescent, with patelliform glandular trichomes concentrated near the base and scattered along the midvein. Inflorescences racemose, 11.9 - 15.5 cm long, sparsely covered with simple eglandular trichomes and stipitate and patelliform glandular trichomes; bracts linear, 1.5 - 2 mm long, puberulent, densely covered with simple eglandular trichomes and stipitate glandular trichomes; pedicels terete, 4 - 12.7 mm, puberulent, with simple eglandular trichomes and stipitate glandular trichomes. Flowers with calyx green, chartaceous, campanulate, 11.9 - 17.6 x 4.8 - 9.6 mm, puberulent, sparsely covered with simple eglandular trichomes and stipitate glandular trichomes, with few patelliform glandular trichomes, lobes 2 - 4, apex mucronate, puberulent; corolla light lilac to dark magenta, membranous, 55.2 - 58.5 mm long, narrowly tubular basal portion 15.6 - 17.2 long x 4.2 - 5.3 mm wide, upper campanulate portion 16.1 - 18.7 mm long x 14 - 15 mm wide, lobes subcircular, 10.5 - 11.7 x 12.7 - 15.7 mm; stamens in two lengths, longer ones 16 - 20 mm, shorter ones 12 - 12.6 mm, thecae 2.5 - 3.1 mm, glabrous; staminode 0.8 - 1 mm, glabrous; gynoecium 34 - 36.3 mm long; ovary glabrous; style glabrous; stigma lanceolate, glabrous; nectariferous disk 3.2 - 3.6 x 1.3 mm. Capsules linear, 20.5 - 116 x 1.1 - 2 cm, glabrous. Seeds ca. 4 x 1.1 cm.