The President's Address. By Lord Avebury. 



161 



surface. It may be smooth, pitted, ribbed, wrinkled, striate, reticu- 

 late, tubercled, aculeate, or hairy. 



The " stones " in fruits such as peaches, nectarines, etc., are 



Fig. 36. — Seed of Stipa pinnata. 



(Prom "Flowers, Fruits, and Leaves.") 



often irregularly roughened, a character which has, perhaps, no 

 significance of utility, but is, so to say, an accidental structure due 

 to the irregular pressure of the cellular tissue on the stone when 

 soft. 



