CHAPTER XI 



LEAVES — FORM AND POSITION 



Leaves may be studied from four points of view, — with 

 reference (i) to their kitids and sJiapes; (2) their position, or 

 arrangement on the plant; (3) their anatomy, or structure ; 



Fig. 8S. — A Simple Netted-veined Leaf. 



(4) their function, or the work they 

 perform. This chapter is concerned 

 with the first * two categories. 



Fig. 90. — Compound or Branched Leaf 

 of Brake (a common fern). 



1% 



Fig. 89. — A Simple Par- 

 allel-veined Leaf. 



Kinds. — Leaves 

 are simple or un- 

 branched (Figs. 88, 

 89), and compound or 

 branched (Fig. 90). 



