3GS 



PLANT STUDIES 



The female gametophyte develops within the embryo- 

 sao, and consists at first of seven independent cells, one 

 of which is the egg, no archegoniuni being formed. The 



Fui. H2^. T)f'vf]n]iinr'nt of cmliryo of shf])lu'r(rs purse t Cifp.^<//in. a Difotyli'don ; 

 Ijegiiiiiiii^ witJi /, the youiii;i-(<t stage, aiul following the sfciiR-iice to IV. tlu- old- 

 est stage, V re]ireseiils the snspensor, c the cotyledons. ,v the stem-tip, w the root, 

 h the root-cap. Tsole the root-tip at one end of the axis and the stem-tip at the 

 other between the eotyledons. — Afler IIanstein. 



egg is in tlie end of tlie sttc nearest the micropyle, in 

 the most convenient position for the entering tube. 

 After fertilization ha,s been accomplished and an oospore 

 formed, one of tlie free cells witliin the embryo-sai' be- 

 gins to divide and to form the endosperm, embryo and 

 BTidosperm thus developing together until the seed is com- 

 pleted. 



