L. amplexicaule: annual; stem dwarf, decumbent; leaves roundish-cordate, obtuse, inciso-crenate, the lower ones stalked, the upper sessile, clasping; flowers in 1-3 compact semi-whorls, the corolla purple, its tube slender, much longer than the softly hairy calyx; lateral lobes of the lower lip of the corolla toothless. - Henbit Nettle. - Waste and cultivated ground. Fl. May to September.

L. purpureum: annual, with low spreading stems; leaves cordate-obtuse, crenate-serrate, stalked, the upper ones crowded, shortly-stalked, ovate; flowers pale purple, the lip spotted with red, the lateral lobes of the lower lip of the corolla with two teeth. - Red Dead-nettle. - Waste and cultivated ground. Fl. May to September.