# 
18. 
D. Sori round or broad oblong 
Fronds jointed to rootstock. Polypodium 
DD. Sori narrow, straight or curved 
E. Sori parallel to the midrib, continuous; frond 
once or twice pinnate / 
i v 
\ 
t 
r 
Plants without trunk; fronds 8-l8"... Blechnum 
» 
EE. Sori more or less oblique to midrib; fronds entire; 
each sorus with one cover which opens from the 
upper side. Asplenium 
G. Trees bearing dry or pulpy fruit; shell of fruit 
with three pores. Cocos nucifera L. 
