琴叶爵床 qin ye jue chuang

Mananthes panduriformis (Benoist) C. Y. Wu & C. C. Hu.

Shrubs to 2 m tall. Stems 4-angled, sulcate, glabrous. Leaves sessile; leaf blade obovate, 15-26 × 7.5-15 cm, glabrous, base attenuate to rounded, margin entire or slightly undulate, apex shortly acuminate. Spikes terminal, elongated; rachis densely pubescent, with 2 or 3 flowers clustered per node; bracts lanceolate-linear, 2-3 mm, apex acute; bracteoles similar to bracts. Calyx ca. 3 mm, outside puberulent, 5-lobed almost to base; lobes linear, apex acute. Corolla white, ca. 8 mm; tube as long as limb; lower lip 3-lobed; upper lip emarginate. Staminal filaments ca. 4 mm, glabrous; anther thecae unequal, superposed, lower one spurred at base. Ovary pubescent; style ca. 6 mm, basal portion slightly pubescent. Capsule not seen. Fl. May-Sep.

Forests on limestone hills. Guangxi, Yunnan [Vietnam].