EXPLANATION vii 
names,”’ or those used by nurserymen and seedsmen in the sale 
of their stock. 
I should further explain the reason for omitting ligatures and 
using such words as peony, spirea, dracena, cobea. As techni- 
cal Latin formularies, the compounds must of course be retained, 
as in Peonia officinalis, Spirea Thunbergi, Dracena fragrans, 
Cobea scandens; but as Anglicized words of common speech 
it is time to follow the custom of general literature, in which 
the combinations 2 and ce have disappeared. This simplifica- 
tion was begun in the “‘ Cyclopedia of American Horticulture ”’ 
and has been continued in other writings. 
L. H. BAILEY. 
Traaca, New York, 
January 20, 1910. 
