1886. ] BOTANICAL GAZETTE. 89 
must have been pushed much farther south than Indiana, as the 
glaciers themselves reached its southern border. The plants of 
Indiana have then stopped on their return journey from the south, 
during the epochs immediately succeeding the glacial, because 
they here found their original and natural climate and surround- 
ings. Of course there may have been several minor counter- 
marches included in this general movement to the south and re- 
turn, but these would not affect the general fact of the movement 
in the least. The physical geography of Indiana gives it an ex- 
tremely variegated and abundant flora, from the high “knobs” 
of the Ohio valley on the south to the low swamps and tamarack 
groves of the lake regions of the north. ‘This flora is also re- 
<eiving continual additions from the railways and streams which 
traverse it or extend along its borders. 
In the table below I have attempted to give, in the first 
column, the direction from this state in which the plants seem to 
be most abundant and most widely distributed; in the second 
the proportion of these which have the limit of their range in 
Indiana or some immediately adjoining state; in the third the 
proportion which go beyond this limit ; in the fourth the propor- 
tion of the plants of each direction relatively to all those of the 
State ; and in the last the number from each direction. 
Bee Oo ea 
; - Limited| Extending (Proportion of} No. in 
Direction. by Ind. |beyond Ind. | No. in State. | State. 
PERN 868 Re eee a, 72 per ct.| 28 per cent. |about 23.p.ct.} 274 
All along the eastern coast from Canada to ed 
Florida and westward. ........... « wl gg 176 213 
Nortu ES PS EE Wrest NTA ie SOM Ce NTS 7 IS 54 84 46 o “ 455 S4 
Bee es ui os er ee Bec ae EO 6 ot ie 
oo py gf OS Ua oe ee rE I te eer EET 8s? ae eg ae ME Le Be Mo eaT 
Common to all N, A. orat least to all U.S. and a S 
pair porthward Pen eee Be oe 8.2 98 
al, or limi i i ; 
Ri ne OY ME ee ns « ga | 3g 
yb SS Aa ty te : y 7 peel ied Se : ype Suet a7 stl og rr “ 99 = 
Ong the Mississippi river .........-.- ee. eee “ 17" | 9 
NORTHWEST nec ¢ oe ee " : ee 1 "9 * “sc “sé 1.6 ** 19 
SouTHwesr Be rg gee PE ey a eee cr Pre Siena.) es & Hilti se “ce 15 * 18 
Total number of plants in the state. 9S Oe ee ee ie 8 ee 1191 
To this total number should be added a few more which have 
been found in the state since this list was made, in order to get 
the full number in the state at present. In this list all plants of 
uropean origin, or which have escaped from cultivation, have 
been omitted. 
The fact that a little more than four-fifths of our plants have 
2 
