148 



BOTANY. 



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

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

 where the leaflets grow from an axis which lengthens more 



A S 



Fig. 127.—^, palmatelj' compound leaf of Horse-chestnut; S, palmately trifoliate 

 ■compound leaf. 



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

 138, 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. 128.— .4, 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 elon- 



