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nineteen : added to this may be, that in this 
Clafs the ftamens are fixed to the receptacle ; 
whereas in the next, which has the title of 
twenty-ftamens, icofandria, though not more 
determined in point of number than the pre- 
ceding one, they are attached to other parts of 
the fructification : their pofition it is alfo ne- 
ceffary to attend to iri the thirteenth clafs ; fo 
that if we regarded only the titles of thefe 
three claries, we mould find ourfelves much 
confufed. This is certainly a material defect 
in the fyftem, which cannot be accounted 
for in a fatisfactory manner. Linneus was 
evidently aware of the imperfection in the 
titles of thefe Clafles, and has guarded againft 
the inconvenience which would arife from the 
firft character expreffrve of a decided number 
of ftamens, by adding in the Key to his fyftem 
the fituation of their growth, by which 
circumftance alone we can diftinguifli thefe 
three clafles on,e from the other. The twelfth 
clafs, icofandria, has generally twenty ftamens, 
often more, which are inferted on the calyx ; 
there are alfo other more obvious charac- 
teriftic marks, which may ferve to diftinguifli 
this twelfth clafs from the following one, and 
f which mould be attended to, as this contains 
moft 
