I PORMS OF LEAVES. 117 



must of course be simple^ while in compound 

 ones it must always be present, though not always 

 subdivided. 



Simple leaves are either Integra, undivided, as those 

 of Grasses and Orchises ; or lobata, lobed, like 

 the Vine, the Thistle, most kinds of Cranesbill, 

 as Geranium pratense, Engl. Bot. t. 404, &c. 



Leaves are frequently undivided and lobed on the 

 same plant, as the Hop, Engl. Bot, t, 42 7* 



The following are the most remarkable forms of 

 Simple Leaves, considering their outline only. 



Orbiculatum, f. 38, a circular or orbicular leaf, 

 whose length and breadth are equal, and the cir- 

 cumference an even circular line. Precise ex- 

 amples of this are scarcely to be found. Some 

 species of Piper approach it, and the leaf of 

 Hedysarum styracifolium is perfectly orbicular, 

 except a notch at the base. 



Suhrotundam, f. 39, roundish, as Pyrola^ EngL 

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

 plants. 



Ovatiim, f. 40, ovate, of the shape of an q,^^ cut 

 lengthwise, the base being rounded and broader 

 than the extremity, a very common form of 

 leaves, as Urtica pilulrfera, t. 148, and Vi?ica 

 major, t. 514:. 



Obovatum, /". 41, obovate, of the same figure with 

 the broader end uppermost, as those of the Prim- 



