BOTANY. 115 



Tribe 2. Menthoideoo. Stamens straight or diverging. Tube of the corolla 

 hardly exceeding the calyx, with four or five nearly equal divisions. Ex. : 

 Isanthus. Mentha, Lycopus. 



Tribe 3. Monardece. Stamens ascending ; the superior, abortive, or 

 synantherous ; the inferior with linear anthers united or halved. Ex. : Salvia, 

 Monarda, Blephilia. 



Tribe 4. Satureinem. Stamens straight, diverging or slightly ascending ; 

 the inferior longest. Anthers not bifid. Tube of the corolla without the ring, 

 scarcely exceeding the calyx and the imbricated bracts ; the limb slightly 

 bilabiate, with flat divisions. Ex. : Cunila, Thymus, Origanum, &:c. 



Tribe 5, Melissinea. Stamens ascending ; the inferior longest. Corolla 

 bilabiate with flat divisions (upper lip rarely arched). Calyx generally tra- 

 versed by thirteen nervures, bilabiate. Ex : Hedeoma, Melissa, (fcc. 



Tribe 6. Scutellaritiecc. Stamens ascending ; the inferior longest. Corolla 

 bilabiate : upper lip arched. Upper lip of the calyx entire or truncate. Ex. : 

 Prunella, Scutellaria. 



Tribe 7. Prostantherea. Stamens diverging or ascending, the lower long- 

 est or abortive. Anthers often dimidiate. Corolla with the tube short, cam- 

 panulate above, the flat divisions disposed nearly in two lips. Achaenia 

 coriaceous, reticidated, w^th the style persistent. Plants entirely Australasian. 

 Ex. : Chilodia, &^c. 



Tribe 8. Nepetece. Superior stamens projecting most. Ex. : Lophanthus, 

 Nepeta, Dracocephalum, Cedronella. 



Tribe 9. Stacliydece. Stamens ascending, the inferior longest. Corolla 

 bilabiate. Calyx not thirteen nerve«!. Achaenia dry, almost smooth. Ex. : 

 Synandra, Lamium, Galeopsis, Stachys, Betonica, Ballota, <fcc. 



Tribe 10. Prasiece. Stamens ascending, the inferior the longest. Corolla 

 bilabiate. Achrenia fleshy. Ex : Prasium, (fcc. 



Tribe 11. Ajus^ordecc. Stamens ascending, projecting considerably beyond 

 the if^per lip, which is very short or bifid, or declined ; achienia with reticu- 

 lated furrows. Ex. : Teucrium, Trichostema. 



Most of the genera adduced above rej)resent this order in the United States. 

 Plants of the order Labiatte are generally fragrant and aromatic, none of them 

 poisonous or injurious. Various species of Mentha or Mint yield volatile oils. 

 Peppermint is M. piperita ; Spearmint, M. viridis ; and Pennyroyal, M. 

 pulegium. Lavender is obtained from various species of Lavandula, one of 

 which (Spica latifolia) furnishes oil of spike. Sweet marjoram is Origanum 

 majorana ; hoarhound, Marrubium vulgare-; thyme, a species of Thymus; 

 savory, of Satureia ; sage, of Salvia ; basil, of Ocymum. The patchouli per- 

 fume is derived from Pogostemon patchouli. 



Galeopsis tetrahit. Hemp-nettle (United States and Europe) {pi 'o'2jig. 7) : 

 or, calyx ; b and c, corolla ; d, fruit calyx ; e, a nut. 



Betonica officinalis (Europe) (/?/. 02, fig. 6). The various figures to all of 

 which 6 is attached need no special explanation. 



Order 86. Scrophulariace.e, the Figwort Family. Calyx divided into 

 four or five parts, unequal, persistent, inferior. Corolla monopetalous, more 

 or less irregular and bilabiate, or personate, sometimes spurred or saccate 



115 



