EQUISETALES 



523 



Fig. 413 a. 



Equisetum pratmse, Khrh. Rhizome with unbraih hod fertile ihootl (•), I fertile 

 shoot which has begun to form branches (b), and a young sterile shoot (r). Natural 

 (After Duval-Jouve; from Rabenhorst's Krypt. Flora.) 



