7350.040 Isodon (Benth.) Spach.

Perennial herbs or subshrubs, much-branched; stems and branches acutely quadrangular. Leaves shortly petiolate to subsessile, ovate to oblong, acute, rounded at base, dentate to crenulate. Inflorescences dichotomously branched axillary and terminal panicles; bracts not sharply differentiated from the leaves; bracteoles linear, very small. Calyx urceolate-campanulate, sometimes obscurely separated into a 3-toothed upper lip and 3-toothed lower lip; teeth sub-equal. Corolla 2-lipped; tube relatively straight; upper lip reflexed, lower lip almost flat.

Worldwide: Around 100 species in tropical and subtropical Asia; 1 species in tropical Africa.

Burundi: 1 taxon.