ON TI1K FOBMS OF STIPULES 



179 



of the stem and the arrangement of the bud. Where 

 the stem is winged the outer barb of the stipule would 

 be exposed. In such cases the stipule is semi-sagittate. 



In the Garden Pea (Pisum sativum) (fig. 26, p. 23) the 

 stipules are not only large in bud, and in arrangement 

 resemble those of L. maritimus, but they continue to 

 grow, reaching a length of fully three inches and one- 

 and-a-half in breadth, and 

 act as a pair of leaflets, 

 which they considerably ex- 

 ceed in size. 



In Lath;/ n/ x AjJtaca (fig. 

 305) the first and second 

 leaves are scale-like and 

 trifid, with three subulate 

 points corresponding to leaf 

 and stipules. The third and 

 fourth leaves are compound, 

 with one pair of leaflets and 

 obliquely ovate stipules of 

 considerable size, and having 

 a tendril represented by a small subulate point. 



The fifth and succeeding leaves are reduced to a 

 subulate point and a pair of triangular, foliaceous 

 stipules. The subulate point develops into a simple 

 tendril on the middle and upper portions of the stem. 

 The tendrils represent the leaves, and are alternate and 

 distichous ; that is, on the J plan of arrangement. 



x'2 



Lathykis Aphaca. 



