Leaves opposite, short petiole; lamina mostly crumpled, when whole, lanceolate or oblong, 5 - 10 cm long; the upper surface blackish-green, the lower surface greyish-green and densely glandular-dotted, pubescent on both surfaces; apex acute, margins serrate. Flowers yellowish-brown, aggregated in leaf axils in verticillate cymes, corolla mostly fallen off, bracts and calyx persistent. Odourless. [3]