PLANT FAMILIES: LABIA TAL. 



287 



these form four nutlets. The leaves are rounded, crenate on the 

 margins, the lower ones petioled and heart- 

 shaped, and the upper ones sessile and clasp- 

 ing around the stem beneath the flower clusters. 

 From the clasping character of the upper leaves 

 the plant derives its specific name of amplexi- 

 caule. The plant occurs in waste places and is 

 rather common. 



Fig. 3»5- 

 Diagram of lamium 



flower. 



CONTORTS. 



548. The gentian family (gentianaceae). — The gentians usually appear 

 late in the summer or autumn. The fringed gentian (fig. 386) lingers often 



Fig. 386. 

 Gentian (G. crinita). 



Fig- 387- 

 The bluet (Houstonia ccerulea). 



