大叶沿阶草 da ye yan jie cao

Stem rhizomelike, elongate, stout, with dense nodes and somewhat woody roots. Leaves somewhat crowded and subterminal, sessile, grasslike, 55--100 × 1--2.7 cm, leathery. Scape 40--45 cm. Inflorescence a reduced panicle, 10--20(--25) cm, many flowered; bracts lanceolate to subulate, basal one 1--1.5 cm. Flowers in clusters of 3 or 4; pedicel ca. 1 cm, articulate distally. Tepals bluish, 5--6 mm, outer ones lanceolate, inner ones ovate. Filaments very short; anthers ca. 3 mm. Style longer than anthers, apically curved. Seeds subglobose. Fl. Aug. 2 n = 36*.

Forests, moist places along valleys; 100--1200 m. Guangxi, SE Yunnan [Vietnam].