186 BUDS AND STIPULES 



on whether there is or is not a bud. If there is no bud, 

 there are no stipules, while if a bud is formed, stipules 

 are also developed. 



In these and other similar cases the stipules must 

 to some extent assist the leaves, which, however, are 

 also well developed. 



In Lathyrus Aphaca (fig. 304), on the contrary, as 

 already mentioned, the leaf-blades have disappeared as 



Fm. 310. SHOOT OF ACACIA VERTICILLATA, x 1^. 



S, S, stipules. 



assimilating organs, and are replaced by two large 

 stipules, which are sessile, triangular, and provided 

 with two large auricles, directed outwards. 



In some species of Adesmia (a South American 

 leguminous genus) leaves are present only on the 

 lower part of the long, straggling branches, the upper 

 part bearing stipules only, which gradually pass into 

 bracts (fig. 311). 



