GENERAL MOEPHOLOGY OB'' THE PLANT 67 



A. Feather-veined or Pi/nnately veined. — In this variety the 

 main vein either gives off lateral ones which proceed at once to 

 the margins {figs. 112 and 113), and are connected by numerous 

 branching veinlets, as in the leaves of the Beech, Spanish 

 Chestnut, Holly, Oak ; or it gives off branches from its sides, 

 which proceed at first towards the margins, and then curve 

 towards the apex, terminating finally within the margins, with 



Fig. 117 



Fig. 118. 



Fig. 116. 



Fig. 119. 



Fig. 116. Leaf showing the variety of parallel venation usually called 



straight-veined ; the margins are entire. Fig. 117. Straight- veined 



variety of parallel venation, as seen in the leaf of the Fan Palm {Ghamm- 



Ttyps). Fig. 118. Ourve-veined variety of parallel venation, as seen in 



the Banana. Fig. 119 Forked venation of a Feni leaf ; the margins 



are crenate. 



which they are connected by small veins, as in the Dead-nettle 

 {fig. 114) and Lilac. 



B. Radiated or Palmately vevned.^-'Shis name is applied to 

 a leaf which possesses two or more strong veins that arise from 

 at or near the base of the lamina, and diverge from one another 

 towards its margins, being connected by branching veins, as 

 in the Melon {fig. 110) and Castor-oil plant (fig. 103).. The 

 ribbed venation, as seen in the Cinnamon {fig. 109), is but 



