Caudex narrowly obconical, 4.5--6 cm, ca. 1.5 cm in diam. Stem basally erect, apically twining, 1.2--1.6 m, apically branched, sparsely retrorse pubescent, with leaves equally arranged along stem. Middle cauline leaves slightly long petiolate; petiole ca. 5 cm, sparsely pubescent; leaf blade pentagonal, ca. 7.8 × 11 cm, both surfaces sparsely appressed pubescent at veins, base cordate, 3-parted; central lobe rhombic, apex acuminate, 3-fid; lateral lobes obliquely flabellate, unequally 2-parted. Inflorescence terminal, 12--14 cm, ca. 11-flowered; rachis and pedicels densely retrorse pubescent; proximal bracts leaflike, distal ones linear. Pedicels 1--3 cm, oblique upward, with 2 bracteoles above middle; bracteoles linear, 7--10 mm. Sepals deep-purple, abaxially pubescent; lower sepals ca. 1.2 cm; lateral sepals broadly obovate, ca. 1.4 cm; upper sepal galeate, ca. 1.5 cm high, shortly beaked, ca. 1.7 cm from base to beak, lower margin slightly concave. Petals glabrous, ca. 1.8 cm; limb ca. 8.5 × 3.2 mm; lip ca. 4 mm, slightly concave; spur incurved, ca. 1.5 mm. Stamens glabrous; filaments entire. Carpels 5, glabrous. Fl. Aug.
Home