Shrubs 4 m tall, densely yellow-brown tomentose on branches, petioles, leaves abaxially, peduncles, and pedicels. Branchlets 4-angled, glandular. Petiole 3.5-8 cm, glandular; leaf blade 10-20 5-10 cm, glandular, adaxially densely pubescent, base rounded to truncate, margin entire, apex acuminate. Inflorescences dichotomous, lax; peduncle 2-7 cm; bracts deciduous; bractlets elliptic-lanceolate, ca. 1 cm. Calyx campanulate, ca. 1.5 cm, yellow-brown pubescent, glandular, with several peltate glands; lobes lanceolate to ovate, ca. 9 mm, acuminate. Corolla white, 3-3.5 cm, tube slender, pilose, outside glandular; lobes ovate, 7-10 mm. Stamens equal or slightly longer than corolla tube. Style slightly longer than stamens. Drupes enclosed in inflated persistent calyx, globose, ca. 4 mm. Fl. and fr. Aug-Oct.

Allied to Clerodendrum trichotomum but differs in stamens and styles not as exserted and petioles densely yellow-brown tomentose.

* Open forests along valleys; 800-1400 m. Xizang (Mêdog), Yunnan (Xishuangbanna Zizhizhou)