NOTE TO THE SIXTH EDITION 



THE new edition has been thoroughly revised; the 

 most important change has been the addition (pp. 134 

 and 186) of a short account of Double Fertilisation 

 in Angiosperms, a remarkable phenomenon (still im- 

 perfectly understood) recently discovered by the 

 Russian botanist, Nawaschin, and confirmed by Guig- 

 nard and others. A new figure (Fig. 86) has been 

 introduced to illustrate this point. 



New figures of the mature fruits of Wallflower 

 (Fig. 49*) and Lily (Fig. 92) have also been added. 



D. H. SCOTT. 



November 12, 1901. 



194733 



