蝴蝶藤 hu die teng

Herbaceous vines, 1-2 m long. Stem slender, glabrous or glabrescent, striate. Petiole 2-3 cm, sparsely pubescent, with 2 conspicuous, auriculate glands in proximal 1/4; leaf blade 2.5-3.5 × 6-10 cm, leathery, glabrous, truncate-bilobed; lobes ovate, 5-7 × 2.5-3.5 cm, abaxially with 4-8 discoid laminar nectaries, lateral veins 2 or 3 per side of midvein, base truncate or subrounded, apically acute or obtuse. Inflorescences sessile, 5-8-flowered, sparsely pubescent. Pedicel 2-6 mm. Flowers yellow-green, 1.5-2 cm in diam.; hypanthium ca. 4.5 mm wide. Sepals 8-10 × 3-4 mm, villous. Petals 6-8 × 2-3 mm. Corona in 2 series; outer series 3.5-4 mm, filaments green at base, yellow at apex, apex thickened; inner series ca. 1.5 mm, filaments green at base, apex yellow and capitate; operculum yellow-green, ca. 1.5 mm tall; disk brownish, ca. 0.4 mm high; androgynophore 4-5 mm tall. Stamens 5; filaments ca. 3 mm, free; anthers oblong, ca. 2.5 × 1 mm. Ovary sessile on androgynophore, ovoid, ca. 2 × 1.5 mm, glabrous; styles 3, free. Fruit blue at maturity, globose, 1-1.2 cm in diam. Fl. Apr-May, fr. Jun-Jul.

● Scrub, forests on limestone hills; 400-500 m. SW Guangxi.