PLANT FAMILIES: LABlATsE. 



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. 385- 



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 coerulea). 



