Purple Deadnettle - Lamium purpureum
Other Names:
Purple Archangel
Stems prostrate to ascending, branched at the base, 8–40 cm. Herbage pubescent. Leaves petiolate blades deltoid to ovate, 7–30 mm long. Inflorescence congested, verticillasters subtended by ovate, leaf-like bracts. Flowers: calyx 5–6 mm long; corolla light purple, 10–15 mm long, upper lip 2–4 mm long (
Lesica et al. 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).