TREES OP THE MISSOURI BASIN 
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L. H. PammeP'^ made a study of the flora of western Iowa from 
a physiographic and ecological standpoint. The plants are dis- 
cussed under the head of swamps and upland with various sub- 
divisions. 
The Acer saccharinum, A. Negundo, Populus deltoides, Salix 
nigra and 8. fluviatilis belong to the lowlands and Quercus 
macrocarpa and Tilia americana belong to the upland. 
The forest resources of the region have been discussed by 
Shimek and Macbride in the papers quoted. G. B. MacDonald^® 
has published a paper on the Timber Resources of Iowa. 
Shimek— Lyon & 
Sioux Counties 
Macbride— Osceola & 
Dickinson Counties 
Maebride^-Cherokee & 
Buena Vista Counties 
Macbride— Sac & 
Ida Counties 
Shimek— Harrison & 
Monona Counties 
Pammel— Harrison, Mono- 
na, Woodbury Counties 
Fitzpatrick— 
F’remont County 
Fitzpatrick- 
Pottawattamie County 
Von Bayer— 
Fremont County 
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Name of Species 
Acer saccharinum 
Acer nigrum 
Acer Negundo 
Amelanchier canadensis 
Amorpha canescens 
Amorpha fruticosa 
Carya cordiformis 
Carya ovata 
Ceanothus americanus 
Ceanothus ovatus 
Celastrus scandens 
Celtis occidentalis 
Ceplialantlius occidentalis 
Cercis canadensis 
Cissus ampelopsis 
Cornus asperifolia 
Cornus paniculata 
Cornus stolonifera 
Corylus americana 
Crataegus coccinea 
Crataegus mollis 
Crataegus punctata 
Evonymus atropurpureus ...... 
Fraxinus americana 
Fraxinus pennsylvanica 
lAlso Hitchcock. 
^Calhoun. 
ispreliminary notes on the Flora of Western Iowa especially from the 
Physiographical, Ecological Standpoint. Proc. la. Acad. Sci. 9: 152-180 f. 
7-18. 
i®Wood-Using Industries of Iowa. Bull. la. Agr. Exp. Sta. in co-operation 
with U. S. Forest Service, 142 : 291-300. 
