TREES OP THE MISSOURI BASIN 
35 
toms there were a good many thickets of the papaw, while on the 
slope of the hill the ironwood was oiie of the dominating plants. 
There was^ however, less of Cary a ovalis than in plot I and plot 
III. TJlmus americmia and Tilia americana materially increased 
in plot III on the east slope. There were found here some old 
cut-over stumps of red oak. One had 85 annual rings and an- 
other 64. The areas in plot IV were taken on the bottom adja- 
cent to the slope. This area is partly under water at times. The 
sycamore was plentiful and usually occurred in considerable 
quantities. There was some soft maple, though it was by no 
means a dominating tree. Adjacent to the slope was some red 
elm. The green ash w^as widely scattered over the plot. The 
undergrowth was mostly blue grass {Poa pratensis). There was 
an abundance of ironweed {Vernonia fascicidata and V. Bal- 
clwini), some sneezeweed {Helenium auhtmnale), morning glory 
(Ipomoea hederacea) and buck brush {Symphoricarpos orticula- 
tus). Wild grape {Vitis vulpina) was plentiful and an occa- 
sional Yitis cAnerea was seen and in low places an occasional 
button brush {CephalantJms occidentaUs) was present. 
