Erect or sprawling perennial, to 1 m high, weakly woody beneath. Stem, branches and leaves covered with short white hairs. Leaves chartaceous, narrowly elliptic to narrowly obovate, 2-5.5 by 0.8-2 cm, remotely serrate or deeply toothed, acute, base attenuate; petiole 0.5-1 cm long. Cylindric thyrse terminal and in the upper axils, 12-15(-25)cm long, consisting of 6-10 verticillasters, each verticillaster consisting of a pair of 3-9 flowered dichasia. Pedicels 3-5 mm long. Bracts linear, minute. Calyx campanulate, pilose, 2-2.5 mm long, 5-lobed; lobes lanceolate, spreading, 3 upper ones slightly longer than the 2 lower ones. Corolla white, 5-6 mm long, the lowermost lobe shallowly boat-shaped. Nutlets elliptical, flattened, 1-1.2 mm (immature) long, hispid.
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