Perennial, strongly aromatic, erect, much branched, hoary pubescent, small shrub; leaves opposite, elliptic-oblong, acute at both ends, entire, glabrous or nearly so, margin sparingly serrate, gland dotted, petioles slender, hairy; flowers subsessile in 5-6 flowered, close whorls; pedicels shorter than the calyx; bracts petioled, ovate, awned; calyx tubular, 2-lipped, pubescent, upper tooth sub-orbicular, broadest , decurrent, flat, shortly mucronate, lower lip with 4-lanceolate-subulate teeth, 2 central teeth longer than the laterals; corolla 2-lipped, white, tube short, upper lip 4-fid, lower entire; stamens-4, much exserted, upper-2 with a tooth or appendage at base, filaments slender, hairy below as long as the corolla, anthers confluent; disk subentire or 3-4 lobed; ovary 4-lobed, style subulate or flattened, inserted in lobes, stigma bifid; nutlets ellipsoid, black; seeds mucilaginous when wet.