Common Deadnettle, Common Dead-nettle, Giraffehead, Henbit, Henbit Deadnettle: Lamium amplexicaule (Synonym: Lamium amplexicaule var. album) - Leaves mostly sessile and clasping. Corolla glabrous within.
Spotted henbit, Spotted Hen-nettle: Lamium maculatum -
Red Dead-nettle, Purple Deadnettle: Lamium purpureum var. purpureum - Leaves petiolate. Corolla with a ring of hairs internally near its base.