148 



BOTANY. 



common point, the leaf is said to be radiately, palmately, or 

 digitately compound (Fig. 127, A and ). In those cases 

 where the leaflets grow from an axis which lengthens more 



Fig. 127. .4, pall 

 compound leaf. 



lately compound leaf of Horse-chestnut; 2?, palmately trifoliate 



or less, the leaf is termed a pinnately compound one (Fig. 

 128, A and B}. It not infrequently happens that in the 

 growth of leaflets they also produce branches, giving rise 

 thus to doubly compound leaves. 



Fig. Is28 A, pinnately compound leaf ; B, pinnately compound leaf, with common 

 midrib prolonged and metamorphosed into a tendril. (See page 136.) 



196. The stipules which occur as lateral appendages upon 

 the petioles of many leaves of Dicotyledons are early leaf- 

 branches which were not carried up by the subsequent eloii- 



