TREES OF THE MISSOURI BASIN 
23 
THE NATIVE AND CULTIVATED FOREST TREES AND 
SHRUBS OP THE MISSOURI RIVER BASIN. 
L. H. PAMMEL, G. B. MacDONALD AND H. B. CLARK. 
At the twentieth annual session of the Iowa Academy of 
Science held in Ames on April 20 and 21, 1905, Dr. C. E. Bessey 
of the University of Nebraska in his address on the Forest 
trees of Eastern Nebraska,^ expressed the wish that the Iowa 
botanists would join with those of Nebraska in making a tree 
survey of the two sides of the river. During the season of 
1914 one of us received a letter from Prof. SargenU asking us 
to furnish him data on the distribution of Iowa trees. We 
found, however, that our knowledge of some species was very 
meager. 
Doctor Bessey reported Carya laciniosa as far north as Sarpy 
county. Apparently it does not occur on the Iowa side of the 
river. Of other species of trees found on the Nebraska side not 
occurring on the Iowa side, mention may be made of Garpimis 
caroUniana, Betula nigra, Rhamnus caroliniana, Aesculus glabra, 
Rhus copallina, Juglans cinerea, Carya glabra, Quercus mart- 
landica, PopuUis occidentalis and SaUx lucida. 
A large number of scattered papers have been published by 
Iowa botanists on the flora of western Iowa. Two early papers 
were written by Bessey^ and Arthur.^ These papers do not give 
any western localities. A third catalogue, “Plants of Iowa”, 
by Wesley Greene®, lists all of the species previously reported 
but without locality. 
T. J. Fitzpatrick® in his Manual of Flowering Plants describes 
species, giving, in many cases, definite localities of the trees and 
shrubs. In other papers either as a joint author or alone^ he 
gives the distribution of most of the trees and shrubs of south- 
western Iowa. 
iProc. of the la. Acad. Sci. iJ: 75-87. The paper includes 67 maps. 
^Sargent wrote to L. H. Pammel asking for a list of the trees in western 
Iowa. 
^Fourth Biennial Report Iowa Agricultural College 1871 ; 90-127. 
^Contributions to the Flora of Iowa, Catalogue of the Phaenogamous 
plahts, published for the International exhibition by the Iowa Centennial 
Commission, 43. 1876. 
®Bull. of the State Horticultural Society, Plants of Iowa, 264. 1907. 
oManual of the Flowering Plants of Iowa, 143. Lamoni, 1899. 
