Elsholtzia

Bongcheewin, B., Chantaranothai, P. & Paton, A., 2015, Elsholtzia (Lamiaceae) in Thailand, Blumea 59 (3), pp. 209-214 : 209

Elsholtzia

Elsholtzia Willd.(1790) 3; Benth.(1833) 160; (1848) 159;Hook.f.(1885) 642; Doan (1936) 976; Mukerjee (1940) 87; Keng (1969) 73; Murata (1971) 497; (1976) 183; Press (1982) 69; X.W. Li & Hedge (1994) 246; Phuong (1995) 35; (2000) 225;A.L. Budantzev (1999) 20. — Type: Elsholtzia cristata Willd.

Aphanochilus Benth. (1829) sub t.1282; (1830) 29. — Type: Aphanochilus blanda Benth.

Erect or prostate, annual or perennial herbs in open or cultivated areas. Stems obtusely quadrangular with longitudinal groves. Leaves opposite, simple, petiolate or subsessile, aromatic. Inflorescence a terminal and axillary thyrse, spike-like, lax or compact, cylindrical or secund; leafy bracts present or absent. Calyx 2-lipped; tube ventricose or slightly ventricose, campanulate or tubular, 10-nerved; lobes subequal, usually thick-edged; upper lip 3-lobed, slightly shorter or equal to the lower lip; fruiting calyx more or less larger, usually enclosed. Corolla 2-lipped; tube glabrescent or glabrous outside, with or without an annulus of simple hairs inside; lobes pubescent, sometimes with translucent dots outside, pubescent or glabrous inside, entire or undulate; upper lip 3-lobed; lower lip 1-lobed. Stamens 4 or 2, exserted or included, each pair inserted at different levels; filaments glabrous or puberulous; anthers 2-celled, kidneyshaped, longitudinally dehiscent, basifixed. Style ascending under upper corolla lip, exserted or included, fleshy, glabrous; stigma bifid with lobes subequal or unequal. Disc 4-lobed with an anterior tumescent lobe. Nutlets obovate, oblong or ovate, 4 rarely 1 by abortion, glabrous.