(133) 



2, Mentha L. MINT. 



Calyx 5-dentate. Tube of corolla included, 

 limb exserted, 4-lobed; upper lobe the larg- 

 est. Stamens 4, scarcely didynamous, erect, 

 distant. Anthers 2-celled. Cells parallel. If. 



1. M. VIRIDIS L. Inflorescence terminal; 

 dense glomerules, crowded around narrow 

 spikes; spikes leafless; leaves almost sessile. 

 Irrigated grounds. Summer. Autumn. Es- 

 caped from cultivation. Native of Europe. 

 (Spearmint.) 



2. M. PIPEBITA L. Inflorescence terminal; 

 glomerules on uninterrupted narrow spikes; 

 spikes leafless; leaves distinctly petioled; flow- 

 ers pale. Irrigated grounds. Summer. Au- 

 tumn. Escaped from cultivation. Native of 

 Europe. (Peppermint.) 



3. M. CANADENSIS L. Inflorescence axil- 

 lary; uppermost axils of leaves without flow- 

 ers. Wet places. Native species. Summer. 



3. Lycopus Tourn. WATER HOKEHOUND. 



Diandrous. Posterior pair of stamens or 

 sterile. Otherwise as Mentha. If. 



1. L. LUCIDUS Turcz. Flowers pale Mar in 

 County. Aquatic. Summer. 



4, Pycnanthemum Benth. MOUNTAIN MINT. 

 Corolla tube as long as the calyx, limb 2- 

 labiate, upper lip nearly entire. Lower lip 



