Description from Flora of China
Plectranthus leucophyllus Dunn, Notes Roy. Bot. Gard. Edinburgh 8: 157. 1913; P. pachythyrsus Handel-Mazzetti; P. thiothyrsus Handel-Mazzetti; Rabdosia leucophylla (Dunn) H. Hara; R. pachythyrsa (Handel-Mazzetti) H. Hara; R. thiothyrsa (Handel-Mazzetti) H. Hara.
Shrubs erect, 50-120 cm tall, much branched, densely gray scaly stellate tomentose or lanate except on corolla; branchlets densely hairy when young, glabrescent. Stem leaves opposite; petiole 0.5-1.5 cm, densely hairy; leaf blade ovate to triangular-ovate, 2-6 × 1.3-4 cm, papery, rugose, adaxially ± densely hairy, abaxially gray, densely hairy, with a brown gland at tooth apex, base obtuse to rounded-cuneate, margin crenate, apex obtuse to slightly acute; lateral veins 3- or 4-paired, oblique, immersed adaxially, elevated abaxially. Cymes 3-9-flowered, remote or compact, in pyramidal panicles 10-24 cm; floral leaves and bracts longer or shorter than cymes; bracteoles minute, linear, ca. 1 mm. Calyx tubular-campanulate, straight or slightly curved, 2.5-3(-4) mm, 10-veined, densely hairy outside; teeth triangular-lanceolate, ca. 1/4 as long as calyx, subequal; fruiting calyx slightly dilated, tubular, base urceolate, slightly curved, glabrescent. Corolla rose, purple, to dark purple-blue, 3-5(-7) mm, puberulent on limb outside; upper lip as long as lower lip, ca. 1.5 mm. Stamens included. Style included. Nutlets yellow-brown, ovoid, ca. 1.5 mm, glabrous. Fl. Jul-Oct, fr. Oct-Nov.
* Thickets on dry slopes; 1400-2900 m. Sichuan, Yunnan.