-em 



FIG. 76. A, Piper medium, showing extensive development of endosperm before first, 

 division of fertilized egg ; x 175 ; B-D. Peperomia pellucida : B, longitudinal section 

 of ripe seed, showing the small embryo, scanty endosperm, and abundant perisperm ; 

 x 55 ; C, terminal portion of a similar section at an early stage of germination ; . 

 x 175 ; D, longitudinal section of a germinating seed, showing the endosperm pro- 

 truding with the embryo; x,55: o, antipodals; c, cotyledons; cp, carpellary tissue j. 

 0, endosperm ; em, embryo ; i, integument ; o, oosphere ; p, perisperm ; r, rhizoid ; ,, 

 synergid ; st, stigma ; t, tapetal cells. After JOHNSON." 

 168 





