Statistics of the Flora of the Northern States. "75 
Betulacen, 1 Polygonacee, 1 
Coniferze, 1 rticacee, 1 
Dicotyledonea, “45 Spall. 
y ’ tulacer, | 1 
Juncacez, 4 oe, ae: 
Cyperacez, 3 Dicotyledonez, 31 
Graminez, 3 
ene 1 
, 
Monocotyledonece, 10 Lemnacee, 1 
21 orders, 52 species. Vaiadacee, 3 
Hydrocharidacee, 1 
Orchidaceae, 2 
tlacee, 1 
Juncacer, 2 
Cyperacez, 6 
Graininex, 3 
Monocotyledonee, 20 
30 orders, 51 species. 
Considered as to size and duration of the plants in connection 
with geo gt ok range, our 320 species common to Europe, are 
Only 3 of them are trees, namely, the Chestnut, White Birch, 
and Yew; and the latter is no tree in this country. All three 
ae ee ie correctly. None of them extend north quite to 
i hestnut not beyond 45°. Two of them range a 
ttle g ‘hs ‘of lat. 40°, ‘and one, the Chestnut, considerably south 
at. 36°, Their geographical distribution, taken in connexion 
th the comparatively restricted area of trees, favors the sus- 
a that these are specifically different from the European. 
Only 15 species are shrubs. All of them occur as far north as 
at. 60°, or else are alpine, and 10 grow within the aretic circle. 
Then 12 are suffruticose or suffrutescent plants, all of them 
arctic-alpine or subalpine, and with their southern southern limit under 
lat. 40° A » except be namely, Arctostaphylos los Uva-ursi, which 
ges 
breadth of the continent at its widest and Ch = ee um- 
bellata, which from iy northern eh at about 55°, is eq oo 
broadly distributed over the continent, and extends southw. 
€ven into Mexi 
The remaj ety 290 species are all herbs; and about 260 of 
pe are perentiials. Of the 30 annuals and biennials, few have 
matt boreal range, but at least 20 of them are anong our 0244 
Cies of widest southern range. mp, lee 
