OSMUNDACEAE 531 
their length :! in the upper regions this is more obvious than in the lower, 
where modifications of reduction and of special development are seen. 
EES SSE Lar ; 
as a = Ks eg 
aE. al 
AtES 
ROS 
LY 
SD 
yi, Sy s 
li y << 
ieee” <Ssj 
(i 4 
a pra 
Maes 
fee. 
Fic. 293- 
Azleaf of Osmunda Presliana, J.Sm. B=young plant of Osmunda vegalis,L. C= 
leaf of mature plant of Oszunda regalis. (From Engler and Prantl, Vad. Phlanzenfam.) 
In the Osmundaceae this results in the formation of the broad protective 
leaf-base. In Osmunda the wings are traceable as continuous down to the 
1See Phil. Trans., 1884, p. 573- 
