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a name peculiar to itfelf : the broad fpreading 
petal at the back of the corol is called the 
Banner ; the fide petals, the Wings ; and the 
two petals, by which the ftamens are enclofed ? 
are termed the Keel, from the refemblance of 
their form to the keel of a boat. The fhape, 
and other circumftances attending thefe dif- 
ferent parts, are found of ufe in diftinguifh- 
ing the genera of this clafs from each other ; 
but the calyx is of moft fervice in this im- 
portant office ; it is to this clafs of plants 
that the legume feed-vefiel belongs. The 
Legume is diftinguifhed from the Silicic 
:and Silique by it's feeds being fixed alter- 
nately on each fide the edges. The eigh- 
teenth clafs is called Poiyadelphia, or many- 
brotherhoods, the flowers contained in it hay- 
ing their ftamens united into diftincT; fets, 
St. John's wort (hypericum) fhows the dif- 
pofition of the ftamens very plainly in that 
genus ; they may, with very little attention, 
be taken off in fmall bunches: the orders of 
this clafs depend on the number of ftamens, 
or, more properly, on the number of an- 
thers in each flower, as fome of the genera 
have five anthers on each filament: indeed, 
this is a circumftance which ought always 
