APOGAMY 



FIG. 33. 



Apogamy in Ptcris , ><//', <i, I,. A and B, development of the first folLu- process rlo.v 

 to the emargination (k) on under surface of prothalius. C, a whole prothallus seen from 

 below, showing a young apogamous shoot. />= prothallus ; />' = first leaf; r' = stem-apex ; 

 w = root. D, a similar growth more advanced. A and B X 145, C and D highly 

 (From Engler and Prantl, after Pe Kary.) 



