MORPHOLOGY OF HIGHER TLAXTS. 



357 



pari-pinnate; when there is an odd or terminal leaflet as in 

 the locust (Fig. 204) the leaf is impari-pixxate ; when the midrib 



Fig. 204. Leaves having different forms of stipules (s) : A, bud-scale stipules of Lirio- 

 dendron Tulipifera; B, thorny stipules and odd-pinnate compound leaf of the locust tree 

 {Robinia Pseud-acacia); C, adnate stipules of rose; D, filiform stipules of the pear; E. fringed 

 clasping stipules (ocrea) characteristic of all of the Polygonums; F, adnate stipules of clover. 



is prolonged into a tendril as in the garden-pea (Pisum) the 

 leaf is said to be cirrhiferous-pinnate. 



Movements of Leaves. — The leaves as well as other organs 

 of plants exhibit a variety of movements or curvatures in response 



