LO)  BOrE WYN Y. 156 
of ail the Parts: But as there are few Ge- 
nera wherein all the Parts are conftant in 
every one of the Species, we ought, where- 
ever it is poffible, to fix upon fome one fin- 
gle Circumftance that is conitant, and make 
it the efential Character. This in moft 
Genera may be had: Thus the Effence of 
Prunella, Torenia, Euphrafia, Alyjum, and 
Crambe, liesin the Denticles of the Stamina; 
that of Curcuma,Chelone, Bignonia,and Mar- 
tynia in amutilate Stamen ; the Ranunculus 
is diftinguifhed by its NeCtarium, which isa 
Pore in the Claws otf its Petals; Hydrophyl- 
/um by the fame Part, which in that Genus 
is a clofed Chink in the Laciniz of the Co- 
rolla; and Hel/eborus and Nigella alfo, by 
their tubulofe Nectaria; in Pancratium the 
Stamina are inferted in the Nedtarium, 
which diftinguifhes it from Nerciffus; in 
Hyofcyamus, there is a Covering to the Cap- 
fules, by which itis known from Phy/alis ; 
the Re/eda has always a lateral NeCtarium, | 
but varies in its Corolla and Piftillum ; the 
Campanu/a has a quinquevalved Netarium, 
but is inconftant in the Corolla and Capfule ; 
and laftly, the Jrzs has a Stigma of fingular 
Conftruction, but varies in the Beard of its 
Corolla. 
There is, however, no one Part of Fruc- 
tification 
