普洱豆腐柴 pu er dou fu chai

Shrubs, climbing, ca. 2 m tall; petioles and inflorescences pubescent when young, glabrescent. Branchlets subterete, grooved. Petiole 0.8-2 cm; leaf blade oblong, ovate, or rarely obovate, 3-8 X 2-4 cm, papery, abaxially dark green but becoming brownish when dry, adaxially dark green and glabrescent but pubescent along midvein, base broadly cuneate to rounded, margin entire or irregularly serrate, apex acuminate to acute, veins 4-6 pairs. Inflorescences corymbose cymes, 2-4 X 3-4 cm, dichotomous or trichotomous; bracts lanceolate, 5-6 mm, both surfaces pubescent. Calyx campanulate, 1.5-2 mm, slightly 2-lipped; lobes 5, pubescent. Corolla greenish, 3.8-4 mm, slightly 2-lipped; lower lip 3-lobed, middle lobe longest; upper lip emarginate. Stamens inserted at corolla throat; filaments basally villous. Style slightly longer than stamens. Fl. Jun.

* Thickets on mountain slopes; 1400 m. Yunnan (Puer Xian)

Allied to Premna subscandens and P. puberula but differs from the former in having leaf blades oblong, ovate, or rarely obovate and bracts lanceolate, and from the latter in having corymbose cymes, calyces campanulate, and calyx lobes obtuse.