1. Spiradiclis arunachalensis Deb & Rout, Candollea. 44: 225. 1989.
藏南螺序草 zang nan luo xu cao
Spiradiclis caespitosa Blume f. subimmersa H. S. Lo.
Herbs, perennial, usually prostrate and rooting on basal nodes; stems glabrous to densely villosulous. Petiole 0.2-1 cm; leaf blade drying papery, oblanceolate to lanceolate-elliptic, 1.5-7.5 × 0.3-1.8 cm, adaxially glabrescent to scaberulous or strigillose marginally and on principal veins, abaxially strigillose to puberulent along principal veins and glabrescent on lamina, base cuneate to acute, apex acute; secondary veins 6-11 pairs; stipules persistent, deeply 2-lobed, lobes narrowly triangular, 4-10 mm, strigillose to glabrescent, acute. Inflorescences dichasially branched 1 or 2 times, strigillose or puberulent; peduncles 2-6 cm; axes scorpioid; bracts linear-lanceolate, 1.5-3 mm. Flowers subsessile. Calyx glabrous; hypanthium portion obconic to cylindrical, 1.7-2.2 mm; limb 0.6-1 mm, deeply lobed; lobes triangular to ovate. Corolla white, shortly tubular, outside puberulent to glabrous; tube 3-4 mm; lobes ca. 1 mm. Capsules narrowly oblong to narrowly oblanceoloid, 2.5-4 × 1.5-2 mm, glabrous, valves 4, becoming twisted. Fl. and fr. Sep.
Moist understories of forests, rice fields at forest margins. Guangxi, Guizhou, Yunnan [India].
See comments about the identity and circumscription of this species under Spiradiclis caespitosa.