L. chinensis: Stems basally prostrate, ..., villous or subglabrous. Leaves opposite or in whorls of 3 or 4, sessile, ovate‑lanceolate, linear‑lanceolate, or rarely spatulate, 0.5–5.3 × 0.2–1.5 cm, base subamplexicaul, margin serrate, abaxially villous along veins, adaxially glabrous or sparsely villous; veins pinnate, inconspicuous.