204 Statistics of the Flora of the Northern United States. 
ART. XV1.—Statistics of the Flora of the Northern United States ; 
= by ASA GRAY. 
special aptitude for this kind of research. JI may. how- E 
Pa: 
ever, collect and arrange the principal data; for the use of those 
The work,* which forms the basis of the following statistics of — 
the botany of the Northern United States, has now been ex- 
the north of it, and those chiefly on the coast of the low south- _ 
iver, and thence due east again, the small quadrangle thus ex- 
* Manual of the Botany of the Northern United States; second edition; inclu: — 
ding Virginia, Kentucky, and all east of the Mississippi: arranged : ak 
Natural System; by ASA ed according to t 
vant). With 14 plates, illustrating the Genera of the Crypt Fe 
George P. Putnam & Co., 1856, J ryptogamia. New Yor 
ng 
AY, (the Mosses and Liverworts by Wa. S. Suture — 
re eR URES ee Way 
