Description: Evergreen or deciduous, hemi-epiphytic pseudoviens or tree to 15 m tall. Leaves opposite, leathery, oblong to elliptic, to 30 x 15 cm, sparsely gray-yellow stellate pilose, base cuneate to rounded, apex acute, margin entire. Petiole ca 2 cm. Inflorescences thyrses, 10–20 cm long, narrow; cymes many-flowers; peduncle to 1 cm; pedicel short. Bracteole 2, small. Calyx campanulate, to 8 mm, irregularly 3 or 4-lobed or apex truncate, lobes orbicular to broadly ovate. Corolla pinkish, to 3.5 cm, tube short, outside stellate hairy incurved; limb 2-lipped; lower lip 3-lobed; upper lip 2-lobed. Stamens 4, didynamous, hairy, inserted near tube base, exserted; staminodes absent. Ovary ovoid-globose, glabrous, obscurely 6-striate. Styles elongated; stigma inconspicuous. Capsule oblong to linear-oblong, 2.5–4 cm, 2-valved, septicidal. Seeds numerous, linear, ca 7 x 1.5 mm, narrowly membranous winged.

Thai name: Chomphu phan (ชมพูพาน), Tumka daeng (ตุมกาแดง).

Photos: Rachun Pooma: Maerim, Chiang Mai, 1400 m (flowers); Doi Inthanon, Chiang Mai, 1800 m (habitat).