ä^ 206. LABIATAE 



ments, medicaments, and a substitute for tea, or serve as ornamental 

 plants. " Sage." [Tribe SALVIEAE.] Salvia L. 



37. Anther-halves globose or ovate, spreading horizontally and usually con- 



fluent at the apex, flat after opening. Stamens 4. Calyx subequally 



5-toothed. [Tribe POGOSTEMONEAE.] 38 



Anther-halves oblong or ovate, not flat after opening 40 



38. Filaments unequal, the lower pair longer, glabrous. Anther-halves tardily 



confluent. Disc one-sided. Corolla slightly 2-lipped, the upper lip 

 somewhat concave and notched, the lower 3-lobed. Herbs or under- 

 shrubs. False whorls many-flowered. — Species 3. East Africa. 



Elsholtzia WiUd. 



Filaments equal. Anther-halves confluent at an early stage. Disc almost 



equal-sided. Corolla subequally 4 — 5-lobed. 39 



39. Filaments bearded. Disc columnar, truncate. Calyx-teeth equal. Corol- 



la-lobes 4. Herbs. — Species i. Southern East Africa. 



Pogostemon Desf. 

 Filaments glabrous. Disc with 4 glands. Calyx-teeth unequal. Corolla- 

 lobes 5. Shrubs or trees. False whorls 6 — lo-flowered, in paniculately 

 arranged spikes. — Species 3. Madagascar. . Tetradenia Benth. 



40. Stamens 4, the upper (posticous) pair longer than the lower, all parallel and 



ascending under the upper lip of the corolla. Calyx 13 — 15-nerved, 

 subequally 5-toothed. Herbs. [Tribe NEPETEAE.] .... 41 

 Stamens 4, the lower longer than the upper, or all equal, or only 2 present. 



42 



41. Anther-halves parallel or nearly so. Disc almost equal-sided. Corolla 



white, with a much projecting tube. Leaves 3-partite. — Species i. 

 Madeira and Canary Islands ; naturalized in South Africa. Used as an 



ornamental plant Cedronella Moench 



Anther-halves spreading. — Species 15. North and Central Africa. Some 

 are used as ornamental or medicinal plants Nepeta L. 



42. Stamens and styles enclosed in the corolla-tube. Stamens 4, in two 



unequal pairs, the lower sometimes with rudimentary anthers. Anther- 

 halves spreading. Style-apex entire or shortly and obtusely lobed. 

 Calyx 5 — lo-nerved, subequally 5— lo-toothed. Corolla 2-lipped ; 

 tube not or slightly projecting beyond the calyx. [Tribe MARRUBI- 



EAE.] 43 



Stamens and styles of the hermaphrodite flowers projecting beyond the 

 corolla-tube, very rarely enclosed in it, but then anther-halves more or 

 less parallel or calyx distinctly two-lipped. Corolla-tube usually 

 projecting beyond the calyx. 45 



43. Nutlets truncate at the apex. Calyx 10 — ii-nerved. Upper lip of the 



corolla slightly convex. Anthers all fertile, those of the lower stamens 

 larger ; halves confluent. Disc equal-sided. Herbs or undershrubs. — 

 Species 6. South Africa and southern Central Africa. 



Acrotome Benth. 



