Description from Flora of China
Herbs, long stoloniferous. Stems ribbed, uncinate-hispidulous, rooting from nodes. Leaves on stems ca. 1 X 1 cm, margin crenate. Petiole of branch leaves 4-8 mm, narrowly winged, uncinate hispidulous; leaf blade broadly ovate to ovate-oblong, 2.6-6 X 1.8-3.5 cm, with uncinate appressed hairs densely so abaxially along veins, margin above base or middle crenate and serrate, apex rounded. Racemes terminal on short branches, lax, 2-12-flowered; bracts linear-lanceolate, ca. 3 mm. Pedicel 0.8-2.5 cm. Calyx 5-7 mm, lobed to base; lobes lanceolate to linear, uncinate hispidulous, margin entire, midrib conspicuous. Corolla ca. 5 mm; lower lip 3-lobed; upper lip arched, unlobed. Fertile stamens 2, posterior, lower than staminodes; filaments short; anther with a curved hooklike spur. Staminodes 2, filament short, unequal. Capsule subglobose, shorter than persistent calyx. Seeds ovoid, yellow-brown foveolate.
* Mountain slopes, dense forests; ca. 400 m. Hainan (Baoting Xian).