390 Statistics of the Flora of the Northern States. 
those which ordinarily are very abundant in individuals wher- 
ever they occur. The latter includes our social plants, as well 
as a larger number which could not properly be so called. I 
should have distinguished the really social plants from the others - 
I knew how to draw any line between the two. It would be 
very difficult to fix upon any precise standard of scarcity or 
abundance: another botanist might give a considerably different 
estimate; and the same species must vary in abundance in differ- 
ent parts of so large an area. No great accuracy is therefore to 
be expected in the numbers. The introduced plants are of course 
left out of view: and the whole following statement may be 
taken to refer rather to the country in its wild state, than as now 
gravely modified in its botanical features by the agency of civil- 
ized man 
1. As to the area occupied, I compute that there are of 
[Exogenz |Fndogene excl. Cyperacce and) Total. 
1. Very local species, - - | 228 26 44 298 
2. Species of small or narrow. 
range, compared with the : 
extent of country embraced 
in the Flora,- - -..- | 542-| 92 144 778 
3 les ging ove 
area equal to between {th 
and #ths of our terri- 
tory, i.e. all not included 
| ia Nod) Sand £5 | B67 49 92 538 
'4. Species of widest range 
| over our territory. - - | 323 59 95 477 
2. As to the abundance of individuals where the species occurs: 
i Exogene. Endogene. | Total. 
|1. Very scarce, - - - - - - 21 
2. Not abundant, - - - - - 66 20 ; 86 
'8. Moderately abundant (as 
| far as known), - - = - + 493 47 | 540 
‘4. Very abundant, - - - - 920 524 1444 
To exhibit the distribution according to the genera, or even 
ld require 
Graminee and Cyperacee are abundant in individuals wherever 
they occur, so that I have thrown in the whole 875 under the 
fourth head; although probably one quarter of them might be 
i Of the 20 
better placed und Endogene which are 
r ery scarce, all. but 
:. ‘pecies are rca te ag ake 
