400 Statistics of the Flora of the Northern States. 
from a pompasann of our flora with an equivalent Euro 
one,—with thé German flora, for example. In Koch’s Plora 
Germanica faxeluding the Adriatic region), I erie 60 indigenous 
species of ats belonging to 27 genera, and comprised in 14 or- 
ders. In own Flora of the Northern United States, adopting 
the same senate as to what constitutes a tree, I count 132 trees, 
in 56 genera, and belonging to 25 orders; as follows :— 
Magnoliacee, 2 genera, and 6 species of trees. 
Anonacez, | ae ee eS. :. 
Tiliaceze. . at ee = 
Camelliacese, ao Po 3 “ 
Anacardiacee, : A esi aes 1 - 
Sapindacee, Eo eee mee. . 
guminose, ‘7 Finck ee . 
eB, 4 “ “ d | 5 oc a“ 
Hamamelacee, : 3 en gel al Sapo: d 
Araliaceee, : ES ecsiagie me 
Cornace - °* — 
Caprifoliacez, ns =I a 
icacese 4 “ “ 2 “ “ 
Aquifoliacese, See ac re # 
Ebenacez, ae ie eee 6. 
Sapotaces, 1 bb “ 2 T3 sb 
Oleacez, 3 “ “ 8 “ “ 
urac 9 “ “ 2 “ “ 
ica aia veut se: ¢ 
Platanacez, ii of 34 % 
Juglandacez, , ee 4. Rea 
Cupulifere, So © Bh te, Z 
Betulacer, 2 Sere, oe ze : 
icacex, 2... PENS: sa = 
Conifere, pes ro 
The only natural order containing trees in the German flora 
and not in ours is the Rhamnacee ; the only order in which the 
German flora exceeds ours in arboreous genera is that of Betulacee 
(which comes es from our not counting any of our Alders as trees); 
the only order in which the German flora has more species 
trees than ours is that of the Salicacee (10 to 7), we oe 
Hag one truly arboreous indigenous Willow. On the other 
our flora surpasses the German not only in the twelve additiona 
orders (one of which is represented by nine species and an 
by six), but also having a greater number of species in ten ae 
of the thirteen orders common to the two countries, and of g 
era likewise i in all but three of them. That is, we possess 
