410 



PTERIS AQVTLIXA. 



exteriorly ordinary pinnae, and on the inner edges small abortive 

 pinnae. 



Fig. 828. 



Cristata, Moore. (Fig. 828.) — A magnificently crested form. 

 Fronds normal in size, tlie apex of each pinna repeatedly 

 branching, the branches having caudate, bicaudate, or tricaudate 

 apices. 



