EQUISETALES 



367 



I'M.. 192. 



Ei/iiisctuin firatcnue, Ehrh. Rhizome \vitli unbranched fertile sin ois (,ii. a 

 shoot which has begun to form branches (I'), and a young sterile shoot c). Natural si/e. 

 (After Duval-Jouve, from Rnbeiihor>t's Krvft. /''fora.) 



