CHAPTER XI 



LEAVES FORM AND POSITION 



LEAVES may be studied from four points of view, with 

 reference ( i ) to their kinds and shapes; (2) \.\\o.\r position, or 

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



FIG. 88. 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). 



73 



FIG. 89. A SIMPLE PAR- 

 ALLEL-VEINED LEAF. 



Kinds. Leaves 

 are simple or un- 

 branched (Figs. 88, 

 89), and compound or 

 branched (Fig. 90). 



