288 OC; FOUNDATIONS OF BOTANY 
ty ye TH 
aS Wore 
DWN 5 
i} 
GE, \f { Witi 
VE.\Nay Wy, 
, y} Ni A 
Nt VY) 
i fh RNY) 
Fic. 210.— Spore-Plant of a Fern (Aspidium Filix-mas). 
A, part of rootstock and fronds, not quite one-sixth natural size ; fr, young fronds 
unrolling; 6, under side of a pinnule, showing sori, s; C, section through a 
sorus at right angles to surface of leaf, showing indusium, i, and sporangia, s 5 
D,asporangium discharging spores. (8 is not far from natural size. Cand 
D are considerably magnified.) 
ba 
