( ) 
it will be well to become perfectly acquainted 
with the different forms which exifi in the 
fimple leaves; as the form of the fingle leaves, 
of which the compound leaf confifts, is a cir- 
cumflance generally noted. The Syftem of 
Vegetables, methodically ftudied, will carry the 
ftudent through this difficult part of botany; 
or, if fometimes he may find himfelf perplexed, 
an explanation of the fame terms in other 
books will be of fervlce to him, as he will 
probably find different words ufed, which 
may elucidate the point on which he may be 
In doubt. There are fome other circumftances 
relative to leaves, which it is equally efTential 
to underftand as thofe which have juft now 
been treated of; thefe are, the determina- 
tion, or difpofition of leaves, which com- 
prehend four particulars alike belonging to 
the fimple and compound kind, the place? 
Jituation> direction, and infertlon. By the place, 
we are to underftand the particular part of the 
plant to which the leaf is attached. Situa- 
tion regards the refpective pofition of leaves 
one to the other : fo leaves are called alters 
nate, when they come out fingly, and are 
ranged gradually on both fides of the ftem, as 
in ivy toad-flax (antirrhinum cymbalaria) ; or 
oppofite, 
