TO. B OFirAcN WwW, 159 
If the Flowers agree, but the Fruits dif- 
fer, the Genus ought not to be parted: Thus 
in thofe extenfive Genera, the Ca/iia, Hedy- 
Jarum, Sophara, Lavatera, Hibifius, and M:- 
mofa, {o great a Number of Species have 
been ranged under the fame Genus, on Ac- 
count of the Conformity in the Flowers, 
though there is a Variation in the Fruit. 
That the Figure of the Flowers is more 
certain than that of the Fruit, appears from 
many Examples; as from Campanula, Pri- 
mula, Antirrhinum, Alifna, Hibifcus, Ciftus, 
&c. but the Proportion of the Parts is fub- 
jet to very great Variation. 
The Number of the Parts is more liable 
to Variation than their Figure, and is found 
fometimes to vary evenupon thefame Plant ; 
as in Ruta, Chryfofplenium, Monotropa, Te- 
tragonia, Eusnymus, Philadelpbus, and Adoxa, 
in the Flowers of al] which the Number of 
the Parts varies from five to four: In thefe 
doubtful Cafes, the natural Number muift be 
collefted from the primary Flower; but im 
the Variations of the Number of the Parts, 
there is a proportional Affinity worth re- 
marking. In Flowers the Stamina ufually 
vary from ten to eight, and from five to four; 
the Corolla and Calyx from five to four, and 
the whole Flower from four to three ; and 
5 the 
