248 AN INTRODUCTION 
in the Genera that belong to any of the her- 
maphrodite Claffes, the fame Circumftance, 
whenever it happens, becomes a {fpecific 
Diftinétion : Thus in Rumex, which belongs 
to the Clafs Hexandria, the Acetofa and 
Acetofella, being dioecious Plants, that is, 
having their male and female Flowers on 
diftin&® Roots, thefe Species are thereby 
diftinguifhed from the reft of the Genus. 
MAGNITUDE is no fpecific Difference, 
but a Variety, being liable to Alteration 
from the Soil or Climate. 
The TIME of flowering is a treacherous 
Mark of a diftindt Species; and, unlefs fup- 
ported by other Diftintions, can only be 
confidered as a Variety. 
COLOR is found fo changeable in the 
fame Species, that it muft be confidered as a 
Variety only. 
In Flowers the Color is moft variable; as 
in Tulipa, Hepatica, Cyanus, Campanula, A- 
quilegia, Vi tola, Galega, Fumaria, and others, 
which it would be tedious to enumerate: 
The moft ufual Change is from B/ue or Red 
to Wiite. The trifling Diftin@ions which 
have been made by Anthophilt (Florifts) in 
fome of the Genera we have here inftanced, 
from the Colors of the Corollz, and to 
which they have given fuch pompous 
Names, 
