FORMS OF LEAVES, 153 



scarcely to be found. Some species of 

 Viper approach it, and the leaf of 

 liedysarum styracifolinm is perfectly 

 orbicular, except a notch at the base. 



Subrotundum, roundish, as Pyrola, Engl. 

 Bot. t. 146, 158 and 213, and many 

 other plants. 



Ovation, ovate, of the shape of an egg 

 cut lengthwise, the base being rounded 

 and broader than the extremity, a very 

 common form of leaves, as Urtica pilu- 

 lifer a, 1. 143, and Vinca major, t. 514. 



Obovatum, obovate, of the same figure 

 with the broader end uppermost, as 

 those of the Primrose, t. 4, and the 

 Daisy, t. 424. Linnaeus at first used 

 the words obverse ovatum. 



Ellipticum, or ovale, elliptical or oval, of 

 a similar form to the foregoing, but of 

 equal breadth at each end, as in the 

 Lily of the Valley, and other Conval- 

 larice, t. 1035, 2/9 and 280. 



Oblongum, oblong, three or four times 

 longer than broad. This term is used 

 with great latitude, and serves chiefly 

 in a specific character to contrast a leaf 



