196 
IOWA ACADEMY OF SCIENCES. 
White, Geol. Sur. Iowa, Yol. 1, p. 138; Bessey, Contr. to the 
Flora of Iowa, p. 119; Arthur, Contr. to the Flora of Iowa, 
p. 29; Pammel, Proc. Iowa Acad, of Sciences, Yol. 1, pt. 2, 
1890-1891, p. 91; Fitzpatrick, Proc. Iowa Acad, of Sciences, 
Vol. 5, p. 164; Yol. 6, p. 196; Iowa Geol. Sur., Yol. 8, p. 314; 
Reppert, Iowa Geol, Sur., Yol. 9, p. 387; Macbride, Iowa 
Geol. Sur., Yol. 7, p. 108; Gray’s Manual, Ed. 6, p. 478; 
Barnes, Reppert, and Miller, Proc. Davenport Acad, of Nat. 
Sciences, Yol. 8, p. 257; Sargent, Forest Trees of N. A., 
p. 154. 
SHRUBS AND TREES OF MADISON COUNTY. 
H. A. MUELLER. 
Madison county is considered a prairie country, yet fully 
one-fourth of its area is covered with shrubs and trees of 
some description. The county is traversed from the west 
to the east by three medium-sized streams, North River, 
Middle River, and Clanton Creek; thus it is known as the 
“ Three-river country.” North River, with its two larger 
tributaries, North Branch and Cedar Creek, is situated in 
the north half of the county. The principal timber areas 
along these streams are in Douglas, Jefferson, and Union 
townships. Middle River flows through the central part, 
while its largest tributary, Clanton Creek, flows through 
the south half from the southwest to the northeast. The 
larger bodies of timber along these two streams lie prin- 
cipally in Lincoln, Scott, Walnut, and South townships. 
Nearly three-fourths of South township has been covered 
with timber. South River flows through a small portion 
of the southeast part. There is not much timber growing 
on this stream. Grand River, west of the Mississippi-Mis- 
souri divide, flows through the southwest corner of the 
county. Some timber is found along this stream and its 
branches. 
The surface of Madison county is quite rolling, notably 
so in the eastern portion. The streams flow through well- 
