No. 56S] X CAP SELL A BUBSA-PASIOBIS ABAC HN OWE A 201 



showing at most a very slight crenation ( Fig. 4) . Usually 

 the ninth leaf, though sometimes it is the eighth and some- 

 times the tenth, shows a more marked indentation, though 

 seldom of a depth of more than 2 mm. on each side of 

 the leaf and slightly below the middle. Subsequent 

 leaves show an increase in the number and depth of the 



indentations, the maximum for both being reached in the 

 climax leaves, which usually show five indentations reach- 

 ing about midway from margin to midrib. In those of 

 the earlier leaves which show a marked incision the lobes 

 are obtuse. In the later leaves the lobes become acute. 

 It may be stated as a general truth, that an increase in 

 the depth of the sinus carries with it an increase in sharp- 

 ness of the lobe. There is no secondary lobing, but some- 

 times the margin of the sinus shows a slight denticulatiou. 

 While in the earlier leaves the sinuses separating the 

 terminal lobe from the rest of the blade are the deepest, 



