\ 
PLATEAU DU COTEAU DU MISSOURI. 157 
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7-8 
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The Plateau du Coteau du Missouri. 
e J. LUNELL. 
When reading Doctor Greene’s paper on North Dakota 
Thalictra I noted with satisfaction that introduction to the 
subject which took the form of an account of the particular 
topography of our region, and admired it all the more because 
I know that the writer had never visited this part of North 
Dakota, and did not doubt that he had gathered those im- 
portant geographic data from maps chiefly; and I was grati- 
fied by this demonstration of the fact that four different floras 
meet here on neutral grgund, intermingle and mutually im- 
press one another. The present writer, having studied the 
botany of this territory for more than twenty years, can only 
confirm the correctness of Dr. Greene’s theory. 
The elevated barrier, whose real name is The Plateau 
du Coteau du Missouri, runs in a fairly straight direction 
from the northwestern corner of the state, where the elevation 
is about 2500 feet above the sea, to the southeastern end, and 
is the great divide between the Missouri basin on its western 
slope, and the basins of the Souris River and the Red River 
of the North on the east side of it. East of the Souris River 
the country rises about 500 feet above the prairie, or 2000 
feet above the sea, and this elevation, called Turtle Mountains, 
is 40 miles long and 20 miles wide. No turtles are foun 
there, but it had its name from the Indians on account of its 
ancied resemblance to that animal. It has quite many 
lakes, drained by rivulets which flow to the Souris. Where 
