AMERICAN MIDLAND NATURALIST. I2I 
are largely oie by the soil on which they grow. Those species 
which we find her Mis a pde struggle in adapting themselves to such 
strained conditi It is wonder, therefore, that the experienced 
MERECE finds d locality A of contradictions. The fact is flora 
is not as yet completely adjusted to the soi r. Edward L. Greene, a 
most Meus A field botanist, suci three weeks here last May (1909), 
to solve some of the puzzles of the northern Indiana flora. He made 
some very interesting deere which he will, no doubt report in due 
time 
S, 
I may be permitted a few personal observations in this matter, i 
may state that for twenty-five years during which I conducted classes of 
botany, most of the time, I had to offer explanations for the dis era aid 
in the descriptions of the species in Gra y's Manual. Most of the species 
did not harmonize with the descriptions in the manual. A boulder of: 
Jasperite, found here some years ago, explains to some extent the cause 
of this confusion. It was found here in Northern Indiana commingled with 
Jasperite is only obtained in Lake perla nd and this piece 
from Indiana commingled with material from Ontario, Canada and from 
Michigan is a clue to the complex soil of Vite Patin Indiana. 
is V. Pirsson, “Rocks and ME aset Pp. 396, defines Jasperite 
as ` name given to....r i ich consist of layers of red cher 
(jasper) and hematite. They occur in the Lake Superior region. e 
page 297." And then he continues: “Jasper is a chemically precipitated 
Opaline silica. In places, as in the Lake Superior regio the jaspers 
are strongly ferrugineous and interlaminated wi gs ‘of hematite 
hey constitute rock-masses of considerable size, affording valuable de- 
posits of alled Jasperite. The cherty (jasper) 
layers are colored bright red by the iron oxide.” m the accompanying 
illustration, the difference between the two layers will be easily seen. 
We add here some of the physical Dacia of the ties 
