246 CLASS XIV. ORDER I. 



Class XIV. DIDYNAMIA. Four stamens, 



two long and two short. 



Order J. GYMNOSPER31IA. Seeds yiahed. 



A. Calyxes mostly five cleft. 



253. Glechoma. Anthers approaching each other 

 in pairs, each pair forming a cross. 



254. Mentha. Corolla nearly equal, four cleft ; 

 the broadest segment notched ; stamens straight, dis- 

 tant. 



255. Hyssopus. Lower lip of the corolla three 

 parted, its middle segment crenate ; stamens straight, 

 distant. 



256. Teucricum. Corolla without any upper lip ; 

 stamens projecting through a fissure in the upper side 

 of the tube ; sides of the fiissure divaricate. 



257. Lamium. Upper lip of the corolla entire, 

 vaulted ; lower lip two lobed ; throat toothed each side. 



258. Leonurus. Corolla with the upper lip erect, 

 concave, undivided, hairy ; lower lip three parted, 

 with the middle segment undivided; stamens longer 

 than the orifice. 



259. Stachys. Corolla with the lateral segments 

 of the lower lip reflected at the side; stamens when 

 old bent outwards. 



260. Galeopsis. Upper lip of the corolla subcre- 

 nate, vaulted : lower lip two toothed above. 



261. Ballota. Calyx funnel shaped, ten striate ; 

 upper lip of the corolla concave. 



262. Nepeta. Corolla with the lower lip crenate; 

 the orifice with a reflected margin ; stamens approxi- 

 mate. 



