727 



ever, must not be passed over in silence, and that is, the liability of 

 the branches to emit two, three, four, or even five, secondary branch- 

 es, from the summit of the second joint : these branches are usually 

 slender, and when present, they give the plant a beautifully compound 

 and feathery appearance. 



The stem presents a transverse section very different from that of 

 any other species (fig. d). 



m 



THE CORN-FIELD EQUISETU^T. 



Equisetum arvense, Linneits. 



