Description from Flora of China
Plants ca. 1 m tall. Petiole conspicuously attenuate winged, 2-3.5(-4) cm; mid stem leaf blade ovate, 5-8 × 2-4 cm, sparsely and minutely hispid to glabrous, densely orange glandular, adaxial veins densely minutely hispid, base broadly cuneate, attenuate-decurrent, margin irregularly shallowly mucronate-dentate, upper leaf blades sometimes ± undulate, apex acuminate. Cymes dichotomous, sometimes each branch forked, ultimate branchlets helicoid; peduncle 1-2 cm densely strigose; rachis densely strigose; bracts subulate, persistent. Pedicel less than 1 mm. Calyx ca. 1 mm, puberulent, sparsely orange glandular; fruiting calyx slightly enlarged, suburceolate, ca. 1.5 mm in diam., conspicuously netted. Corolla ca. 4 mm, puberulent and glandular outside; tube ca. 3 mm, cylindric, straight; upper lip oblong, apex emarginate; lower lip enlarged, spreading. Nutlets ovoid, apically hairy, glandular. Fl. Jul-Aug, fr. Sep-Nov.
Wet areas beside marshes in sparse valley forests. Hainan [Indonesia, Philippines].