FIG. 1. 0\ LLE OF H>,US SYL-YESTRIS, SHOWING THE &RO^\ TH OF 

 THE POLLEN TUBES. 



FIG. 2. A sei:j iLJ-;tfs i:c.(; 1''j:i"it.— xi >'i' !•' ii.i.i .nati-; 



