the Scie?Ke of Botany. 1 5 



genera are well defined, and do not burden 

 the memory j as for example, 



CordatO'Oiuitum . Ovato-cordatiifn . 



CordatO'oblo7igum. Oblongo-cordatum. 



Cordato-lanceolatum* Lanceolato-cordatum, 



Cordato-fagittatum, Sagittato-cor datum. 



CordatO'haJlatum, Hajiato-cordatum^ 



There muft be great care taken in placing 

 the genera either firft or laft, in the formation 

 of the fpecies, for this is not indifferent 5 the 

 laft denotes the form in which the leaf re- 

 fults, and the firft in fome meafure corredls it, 

 by adding a fort of exception to it 3 fo that 

 by changing their place, it will alter the defi- 

 nition of the leaf. As for example, Cordato^ 

 ovatum, by this is to be underftood a leaf more 

 approaching to an oval. But when it is Ovato^ 

 cordatum, the leaf is fuppofed to be more of a 

 heart-fhape. But this will be better conceived 

 by their figures hereafter referred to. 



Leaves are divided into the three following 

 claffes. 



1. Single leaves. 



2. Compound leaves. 



3. Determinate leaves. 



The 



