Dysophylla tsangii Sun ex C. H. Hu.

Herbs annual. Stems erect to trailing at base, 15-50 cm tall, basal internodes short, glabrous, reddish. Leaves in whorls of 3(-5), rarely opposite, obovate-oblong to oblanceolate, 0.9-6.2 cm × 4-8 mm, papery, glabrous, densely black glandular, base attenuate, margin conspicuously serrate except basal 1/3 entire, apex obtuse to acute. Spikes 1.2-7 × ca. 0.8 cm; rachis glandular villous; bracts ovate-lanceolate, scarcely longer than calyx, reddish. Calyx broadly campanulate, ca. 1.4 × 1.4 mm, pubescent, basally yellow glandular outside, purplish red; teeth ovate, more than 1/3 as long as calyx. Corolla purple-red, ca. 2 mm, lobes subequal. Stamens much exserted; filament hairs purplish red. Nutlets dark brown, ovoid, ca. 0.7 × 0.5 mm, shiny. Fl. Sep-Oct, fr. Oct-Nov.

* Marshy areas, beside water. Guangdong, Guangxi, Guizhou, Hunan, Jiangxi.