^em 



cm 



Fig. 76. — -4, Piper medium, showing extensive development of endosperm before first 

 division of fertilized egg : x 17"' : Jl-I'. 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; i), longitudinal section of a germinating seed, showing the endosperm pro- 

 truding with the embryo; x 55: a, antipodals ; c, cotyledons ; <y\ carpellary tissue ; 

 e, endosperm ; em. embryo : /. integument : o. oosphere ; p, perisperm : r. rhizoid ; s > 

 syncrgid; st, stigma; t. tapetar cells. — After Johnson." 

 169 



