PLANT: Perennial herbs, pubescent, glandular, the hairs straight, the glands sunken; stems erect or sometimes prostrate. LEAVES: opposite, linear, lanceolate or triangular, green; margin entire, serrate or crenate. INFLORESCENCE: an indeterminate spike or raceme. FLOWERS: calyx membranous, bicolored, actinomorphic or nearly so, 5 toothed, the teeth free (or 3 upper teeth partially connate), deltoid to attenuate; corolla tubular, zygomorphic, white, yellow, orange, pinkish or purple, the upper lip of 2 fused lobes, the lateral lobes 2, more fused to the upper lip than the lower lobe, the lower lobe clawed with its limb repand, erose or lacerated; stamens 4, exserted from corolla tube but not always exceeding corolla lobes, the filaments adnate to corolla, the anther sacs parallel; style branches equal; ovary lobes nestled in depressions atop the gynophore. NUTLETS: ovoid to oblong, triangular in cross section, with hairs on upper half. x = 9. NOTES: 22 spp.; sw U.S. and n Mex. (Greek: agan = much, stachys = spikes). Sanders, R. W. 1987. Syst. Bot. Monogr. 15:1 92. REFERENCES: Christy, Charlotte M. 2003. Lamiaceae J. Ariz. – Nev. Acad. Sci. Volume 35(2).