Class XIV. Order L 



DIDYNAMIA. 



G YMNOSPERMM. 



173. GLECHOMA. 



GLECHOMA HEDERACEA. L. Ground Ivy. Grill. 



Leaves reniform, crenate. 



A creeping plant, usually found about fences or in shady 

 places. Stems square, procumbent. Leaves opposite, petiol- 

 ed, heart or kidney shaped, crenate, hairy. Flowers in whorls, 

 a few together. Calyx striated, ending in five unequal, pointed 

 segments. Corolla blue, the upper lip straight, the lower ex- 

 panded, three lobed, the middle lobe emarginate. Each pair of 

 anthers meet, forming a cross. Ground ivy has a peculiar 

 strong taste and smell, and possesses some medicinal reputa- 

 tion. May, June. Perennial. 



174. MENTHA. 

 MENTHA BOREALIS. Mich. Horse-mint, 



Ascending, low, pubescent; leaves petioled, 

 oval-lanceolate, acute at both ends ; flowers in 

 whorls, stamens projecting. Mich. 



Inhabits the banks of rivulets and ditches. Stem square, 

 downy. Leaves opposite, on downy petioles, oval, acute, ser- 

 rate, the upper ones lanceolate. Flowers in regular, axillary 

 whorls, on short peduncles. Stamens somewhat longer than 

 the corolla. June, July. Perennial. The taste and proper- 

 ties resemble those of Pennyroyal. 



MENTHA VIRIDIS. L. Spear-mint. 



Spikes interrupted ; leaves sessile, lanceolate, 



