9 
Others his descriptions are too short, or not charac¬ 
teristic ; it was then merely by presumption, and with 
doubt, that the real names could be stated. The names 
of Robin are always added in synonimy, and with re¬ 
ference to the page in his Flora, or third volume of 
his travels. 
To each specie, all the interesting particulars men¬ 
tioned by Robin are added; likewise, such parts of 
his descriptions as are not found in Michaux and Pursh. 
When the species are new, a botanical name is given 
to each, which is followed by a Latin specific defini¬ 
tion or diagnosis, and a translation of the whole of 
Robin’s observations, on the plan of Pursh’s Flora. 
New genera have been properly named and charac¬ 
terized by generic denominations and definitions, to 
which appropriate observations on their natural affini¬ 
ties are added, together with the etymology of their 
name. It may not be amiss to observe, that although 
Robin has, in a few instances, mentioned that the plants 
he describes appeared to be new genera or species, 
he has in no instance given them proper Botanical 
names. 
The result of this labour consists in the enumera¬ 
tion of more than 400 species, whereof 196 are new, 
and in the introduction of 30 new genera, besides se¬ 
veral, such as Aretia , Peucedanum , Acanthus , Lantana , 
Chrysophyllum, fyc. which had not yet been introduced 
in the North-American Flora. Among the 196 new 
species, are to be reckoned 15 new trees of the ge¬ 
nera. Celtis, Laurus , Till a, Fraxinus , Ulmus , Gledits - 
chia, Hicorius, Chimanthus, and 18 shrubs, prin¬ 
cipally of the genera Arbutus , Chrysophyllum , Prunus , 
