130 



MORPHOLOGY OP ANGIOSPERMS 



The number of chromosomes observed in connection with 

 the reduction division have been noted in the preceding chap- 

 ter (p. 81). 



FIG. 61. First division of pollen mother-cell, showing formation of the bipolar from the 

 multipolar spindle. A, , E, F, Lilium Martdgon ; <?-Z>, L. candidum. A, double 

 row of chromatin granules upon the linin thread ; B, later stage in which the entire 

 thread has split longitudinally ; (7, formation of a weft of fibers about the nucleus ; 

 Z>, multipolar spindle ; E, bipolar spindle ; F, telophase of first division showing- 

 that the division is of the successive type. After MoxTiER. 26 



