Subshrub or robust herb. Stems 0.5-2m,obscurely angled, villous tomentose to pubescent. Leaves usually in whorls of 3 or 4, narrowly elliptic, 5.4-11 x 1.7-3.2cm, base cuneate, apex acute or shortly acuminate, margin regularly serrulate, upper surface pilose, lower surface densely white tomentose; petiole 2-6mm. Inflorescences lanate tomentose, 22-40 x 1.7cm, spike like, axillary, suberect, cymes dense. Pedicels up to 1.5mm. Calyx sub-bilabiate, campanulate, c 2mm, densely white hairy; teeth 1-1.5mm; fruiting calyx tubular, up to 5mm long, prominently ribbed. Corolla white to pale violet, c 6.5mm; tube c 2mm, gibbous; upper lip erect or recurved; lower lip straight. Stamens not exceeding lower lip, curving up at apex. Nutlets oblong ovoid, rounded trigonous, c 2mm.
Most probably Isodon rugosus
Leaves do not suggest Isodon rugosus at least.
Isodon ternifolius (D.Don) Kudô