162 
IOWA ACADEMY OF SCIENCES. 
645; Grow, Proc. Iowa Acad, of Sciences, Yol. 6, p. 62; Rigg, 
Notes on the Flora of Calhoun County, p. 25; Barnes, Rep- 
pert, and Miller, Proc. Davenport Acad, of Natural Sci- 
ences, Vol. 8, p. 255; Reppert, Iowa Geol. Sur., Vol. 9, p. 
886; Arthur, Flora of Floyd county in History of Floyd 
County, p. 800; Bot. Gaz., Yol. 7, p. 127. 
Jnglans cinerea L. Sp. PI. Ed. 2, 1415, 1763. Butternut. 
White Walnut. A tree, smaller than the black walnut, 
bark gray, twigs and petioles viscid-pubescent; leaflets 11- 
19, oblong-lanceolate, acuminate, base obtuse, rounded or 
truncate; fruit oblong, pointed, clammy, 2-celled at the 
base. 
The wood of this species has many characters in common 
with the black walnut and is used in cabinet work, interior 
finish, etc. The wood differs from the black walnut in 
being light, soft, of less strength, and of a light brown 
color. Trees rarely exceed 80 or 90 feet in height and are 
usually less than two feet in diameter. 
Our specimens are from Fayette and Johnson counties. 
We have observed the species in Jefferson, Allamakee, 
Winneshiek, Clayton, and Dubuque counties. The state 
university herbarium contains specimens from Lee, Win- 
nebago, Des Moines, Cerro Gordo. Delaware, Pottawatta- 
mie, and Fremont counties. Mr. Reppert reports the species 
from Muscatine county; Messrs. Nagel and Haupt from 
Scott county ; Professor Bessey from Story county; Professor 
Macbride from Humboldt county; Mr. Gow from Madison 
county; and Professor Pammel from Boone and Hardin 
counties. In general the butternut is frequent all along 
the eastern border of Iowa and passes through the central 
portion west to the Missouri river. It appears to be absent 
in our strictly southern counties. A decoction of the bark 
is frequently employed in domestic dyeing. 
White, Geol. Sur. of Iowa, Yol. 1, p. 138; Bessey, Contr. 
to the Flora of Iowa in Fourth Report of Iowa Agr. Col., 
p. 118; Arthur, Contr. to the Flora of Iowa, p. 29; Nagel 
and Haupt, Proc, Davenport Acad, of Nat. Sciences, Yol. 
1, p. 163; Hitchcock, Trans. St. Louis Acad, of Science, Yol. 
5, p. 517; Pammel, Iowa Geol. Sur., Yol. 9, p. 243; Yol. 10, 
