80 
IOWA ACADEMY OF SCIENCES 
Family Juglandaceae. 
Butternut {Juglans cinerca L.) is common in the Missouri forests, 
from which it has been carried into the southeastern part of Nebraska, as 
far as Gage, Johnson, Otoe and Cass counties (4G). 
Walnut {Juglans nigra L.)is found in abundance in the forests in the 
Missouri River Valley southeast of Nebraska, and from here it has moved 
up that river and up the Niobrara valley to Cherry county. It has occu- 
pied the southeastern corner of the state, and the Republican valley to 
Harlan county (47). 
Shellbark Hickorj (Hicoria ovata (Mill.) Britt.) is common in the 
Missouri forests, from which it has been carried into the southeastern 
counties of Nebraska, from Gage to Cass (48). 
Big Hickory Nut {Hicoria laciniosa (Michx.) Sarg.) occurs in the 
Missouri forests, from which it has been carried northward along the 
Missouri river from Richardson to Sarpy counties (49). 
Mocker-Nut {Hicoria alba (L.) -Britt.) occurs in the Missouri forests, 
from which it is reported to have moved northward (50) into eastern 
Nebraska {Sargent.) 
Pig-Nut {Hicoria glabra (Mill.) Britt.) is common in the Missouri 
forests, from which it has been carried along the Missouri River into 
eastern Nebraska from Richardson to Cass counties (51). 
Bitter Hickory {Hicoria minima (Marsh.) Britt.) is common in the for- 
ests of the Misouri River Valley, from which it has been carried north- 
ward into the southeastern counties of Nebraska (52) from Richardson 
to Pawnee, Lancaster and Cass. 
Family Fag ace ae. 
White Oak {Quercus alba L.) is common in the Missouri forests, from 
which it has been carried into southeastern Nebraska (53) as far north 
as Cass county. 
Post Oak {Quercus minor (Marsh.) Sarg.) is found in the Missouri 
forests, from which it is reported to have moved northward (54) into 
southeastern Nebraska {Sargent). 
Bur-Oak {Quercus macrocarpa Michx.) is abundant in the Missouri 
River valley forests, from which it has migrated along the river valleys 
fully half w’ay across the state (55), reaching Harlan county on the south, 
Custer county in the center and Cherry county on the north. It occurs 
also, in the Black Hills of South Dakota, to which it was probably brought 
from the same Missouri forest area. 
Yellow Oak {Quercus acuminata (Michx.) Sarg.) found in the Missouri 
forests, has barely reached Nebraska (5G) in Richardson county. 
Low Yellow Oak {Quercus prinoicles Willd.) of the Missouri forests 
has barely reached southeastern Nebraska (57) in Richardson county. 
Red Oak {Quercus rubra L.) is common in the Missouri forests, from 
wdiich it has been carried northw'ard along the Missouri river to Dixon 
county (58) and westward fifty or sixty miles. 
