PLANT: annual; hairs non glandular; stems 4 45 cm tall. LEAVES: petioles 10 35 mm long; blades 5 18 mm long, 5 20 mm wide, mostly triangular-ovate, rarely longer than wide; bases mostly cordate; margins coarsely and irregularly crenate or serrate, rarely lobed. INFLORESCENCE: bracts ascending to horizontal, sessile or the lowest with a short petiole, 6 30 mm long, 8 40 mm wide, reniform to broadly ovate, the base truncate to somewhat clasping, the margin shallowly lobed and coarsely and irregularly crenate. FLOWERS: calyx 4 7 mm long, pilose; corolla red purple, 10 20 mm long, the hood with red purple trichomes dorsally, the lower lip white with red purple margin and spots with middle lobe contracted near base. NUTLETS: ca. 2 mm long, shiny brown with white patches. 2n = 18, 36. NOTES: Lawns, roadsides, riparian and disturbed areas: to be expected in most populated areas of AZ but specimens only document Cochise, Coconino, Gila, Greenlee, Maricopa, Pima, Pinal, Santa Cruz, Yavapai cos.; 350 2150 m (1100 7000 ft); Feb May; extensively naturalized in the New World, including nearly all of the continental U.S.; Eur. This species is easily recognized by its long exserted flowers and the broad, overlapping, sessile bracts that form a platform or bowl below each of the widely spaced verticils. The other widely naturalized species of this genus, L. purpureum L., occurs in most of the states bordering AZ. It can be easily distinguished by its petiolate, reflexed bracts which usually overlap the bracts of the subjacent verticil. REFERENCES: Christy, Charlotte M. 2003. Lamiaceae J. Ariz. – Nev. Acad. Sci. Volume 35(2).