TREES OP THE MISSOURI BASIN 
47 
Quercus acuminata Houba. Chestnut Oak. Equals Q. Muhlen- 
hergii Engelm. Gray’s Manual 7th Ed., p. 341, /. 676. Hamburg 
1 (HBC), 7, 8, 11 (LHP & HBC), Payne (LHP & HBC). The 
leaves of this species are extremely variable, some quite narrow 
lanceolate to oblong. In No. 8 the leaves are obovate, suggest- 
ing the Q. Michauxii. The specimen with broad leaves comes 
from a tree all of which had broad leaves. The Q. Michauxii 
occurs in Missouri and southward. The chestnut oak occurs on 
the low hillside or even on the banks of small streams of the 
small valleys. 
Quercus rubra L. Red Oak. Oto 44 (HBC), Sioux City 4 
(HBC), Hamburg 10 (LHP & HBC), Payne (LHP & HBC), 
Sioux Rapids (LHP), Council Bluffs 81 (LHP & HBC), 
Missouri Valley (HBC). The red oak is not common in western 
Iowa, more common southwest than northward. There are some 
nice groves on the shady slopes near Council Bluffs. 
Quercus velutina Lam. Black Oak. Quercitron oak. Logan. 
Reported by Shimek. We have not seen it. This species occurs 
in Story county but is a rare tree. The occurrence here is of 
great interest. 
Quercus imhricaria MicJix. Shingle Oak. This is reported near 
Sidney but we have not seen specimens. 
ULMACE^ Elm Family. 
TJlmus Amci^icana L. American Elm, Sioux Rapids 
(HBC), Oto 26 (HBC), Sioux City (LHP), Whiting (LHP & 
HBC), Payne (LHP & HBC), Hamburg 34 (LHP & HBC), 
Missouri Valley 9, 70, 78 (HBC), Sioux Rapids (LHP), Council 
Bluffs 27 (LHP & HBC). The most common elm along the 
Missouri. 
Ulmus fulva Michx. Red Elm. Missouri Valley 7, 19, 78 
(HBC), Hamburg, Payne, Sioux City (LHP & HBC), 15 (LHP 
& RST), Sioux Rapids (LHP), Council Bluffs 28 & 44 (LHP & 
HBC). On the loess bluffs. 
Ulmus racemosa Thomas. Cork or Rock Elm, Sioux Rapids 
(LHP). A small grove near Sioux Rapids on a bluff' near the 
C. & N. W. Ry. east of the city. It is apparently not common 
anywhere in the region. Also reported by Prof. Shimek from 
Harrison county, and Frank Pellett states it is reported in Cass 
county. This locality is not based on specimens. 
