26 THE NEW METHOD 



half high and nearly three inches wide in the broad- 

 est part — the middle. 



" The stipe is about four inches long and is grooved 

 on its upper side. 



11 The pinnae are sometimes nearly two inches long 

 and half an inch wide. There are twenty-two pairs 

 of pinnae on the rachis — some are opposite, but most 

 are alternate. The pinnae are divided into pinnulae 

 or lobes ; there are about forty-four pinnulae on the 

 second rachis and they are all opposite.' Isa. 



