CHAPTER III. THE LEAF. 



3 1 



section of a hen's egg, and has the petiole at the larger end, Fig. 

 71 ; the obovate, or inversely ovate, as in Fig. 72 ; the spatulate, 

 which is larger and rounded at the apex, and tapering at the 

 base like the old-fashioned spatula, Fig. 73 ; the panduriform, 

 or fiddle-shaped, Fig. 74 ; the orbicular, which is nearly circular 

 in outline, Fig. 75 : the ensiform, or sword-shaped, as in the Iris, 



Fig. 73. 



Fig. 74. 



Fig. 75. 



Fig. 76. 



Figs. 65 to 77, inclusive, diagrams illustrating forms of leaves as respects general 

 outline ; 65, linear ; 66, oblong ; 67, elliptical ; 68, oval ; 69, lanceolate ; 70, oblanceolate ; 

 71, ovate ; 72, obovate ; 73, spatulate ; 74, panduriform ; 75, orbicular ; 76, ensiform ; 77, 

 subulate. 



Fig. 76; the subulate, or awl-shaped, as the leaves of Arbor Vitae 

 and Cedar, Fig. 77 ; and the filiform, or thread-shaped, propor- 

 tionately very long and narrow, as the leaves of Asparagus. 



(bj The Apex. — As regards the shape of the apex, the fol- 

 lowing are the more important forms : The obcordate, or inversely 

 heart-shaped, Fig. 78 ; the emarginate, or notched, Fig. 79 ; the 



Fig. 78. Fig. 79. Fig. 80. F'ig. 81. Fig. 82. Fig. 83. Fig. 84. Fig. 85. Fig. 86. 



Figs. 78 to 86, inclusive, diagrams illustrating forms of leaf apices; 78, obcordate; 

 79, emarginate; 80. retuse : 81, aristate ; 82, mucronate (or if the point be hard, cuspidate) ; 

 83, truncate ; 84, obtuse ; 85, acuminate ; 66, acute. 



refuse, with a broad, shallow sinus at the apex, Fig. 80 ; the 

 aristate, with the apex terminating in a bristle, Fig. 81 ; the 

 7nucronate, with the apex terminating in an abrupt, soft point, 

 Fig. 82 ; the cuspidate, the same as mucronate, but with a hard 

 point ; the truncate, with the apex terminating abruptly, as if cut 



