162 AN INTRODUCTION 
allowed any place in determining the Gene- 
ra; for in full Flowers no number of Pe- 
tals can be affigned, and the Stamina are ge- 
nerally wanting, the Number of which 
makes a Part of the Generic Character; and 
in mutilate Flowers, as in fome Species of 
Campanula, Ipomoez, and Ruellia, the Corolla 
would be excluded from the Defcription, 
contrary to the Nature of the other Species 
of the Genus. But as the Calyx * in full 
Flowers is fcarce ever altered, it may detect 
the Genus; and the loweft Series of Petals 
in Polypetalous Corojle remaining the fame 
jn refpect to Number, the Genus may alfo 
be often known by that Character; as in 
i Papaver, Ni igella, and Rafa. 
* Some Syftematifts have diftributed the whole Body 
of Vegetables by the Differences of the Cax; and in 
fuch Syftems the full Flowers, as our Author obferves, 
are more eafily referred to their proper Genus than in bis 
own, the Calyx not being fubje€t to Luxuriancy: In- 
ftances of this are In Hepatica, Ranunculus, and Alcea, 
CHAP, 
