CLASSIFICATION OF ANGIOSPERMS. 503 



FIG. 279. Rattlesnake Plantain, a rather common orchid, variously known as Epi- 

 pactis, Peramium, or Goodyera pubescens. It is generally found growing in coniferous woods 

 and characterized by the dark-green basal leaves with their prominent nerves and numerous 

 white reticulating veins. The flowers are greenish-white, numerous and crowded on the 

 erect scapes. After Troth. 



simple collateral to bi-collateral ; annular rings are formed in the 

 perennial. stems; (4) the germinating plant usually has two coty- 

 ledons which are opposite each other. The Dicotyledons are 

 divided into two series or sub-classes, depending upon whether 



