26 Field, Forest, and Wayside Flowers 



All is ready for its reception. The part of the 

 pistil which it must penetrate is never filled with 

 anything more substantial than a loose mass of 

 large cells, called " conducting tissue," and, in some 



FIG. 3<. Pollen-grains of the European hazel or filbert (Corylus 

 Avellana) putting forth their pollen-tubes. 



few species of blossom, it is empty. So in due time 

 the end of the pollen-tube reaches one of the baby 

 seeds in the pistil's base, and enters it by a minute 

 orifice in the seed-coat. 



