Dianella mairei H. Léveillé, Bull. Acad. Int. Géogr. Bot. 25: 39. 1915; Disporum mairei H. Léveillé; Stemona filifolia Schlechter; S. stenophylla Diels ex Schlechter; S. vagula W. W. Smith; S. wardii W. W. Smith.

Vines. Roots ovoid-oblong. Stems sometimes branched, 20--100 cm × ca. 2.5 mm. Leaves opposite or whorled, subsessile; leaf blade narrowly ovate to linear, 1.5--7 × 0.2--1.2(--3) cm, veins 3--5, base rounded to cuneate, apex acute. Inflorescences axillary or at base of leaf midvein, erect, racemes, 1(or 2)-flowered; peduncle filiform, 1--2.5 cm; bracts setaceous, ca. 3 mm. Flowers opening fully or not. Perianth segments white tinged with pink, 20--25 × 5--8 mm, apex acute. Stamens shorter than perianth; filaments very short; anthers ca. 6 mm; adaxial appendage broad, ca. 5 mm, apex obtuse. Ovary obliquely ovoid, small; ovules 6. Capsule globose-ovoid, ca. 8 × 7 mm, ca. 5-seeded. Fl. Apr--Jul.

* Scrub, mountain slopes, dry grasslands, limestone rocks; 800--3300 m. Sichuan, N Yunnan.