XXV] 



BOTRYOPTERIS 



439 



structure with the main vascular axis. Scott', in referring to 

 the inclusion of this type in the genus Botryopteris, expresses 

 the opinion that its habit must have been very different from 



Fio. 305. Botryopteris cylindrica ( x 30). From sections in tiie Cambridge 

 Botany School. 



1 Scott (08). 



