IOWA ACADEMY OF SCIENCES. 
89 
of more frequent occurrence than in the eastern region. The 
stronger winds and drier climate would cooperate in effecting 
the transportation of larger quantities of alluvium, which would 
also be somewhat coarser and more siliceous. The frequent 
interlamination of sand with the loess can be accounted for by 
more violent storm-periods. 
The writer has seen such alternating deposits of sand and 
loess in Cuming county, Nebraska, near the margin of the Sand 
Hill country, which clearly show wind- action. 
Much could also be written of the changes which probably 
took place after the deposition of many of the beds of loess, 
of the denudation of some of the hills, the modifications of the 
deposits by erosion, and kindred subjects, the discussion of 
which in connection with this question would be legitimate and 
desirable, but this would extend this paper beyond reasonable 
limits, and is therefore postponed. 
The consideration of the facts herein briefly presented leads, 
then, to the conclusion that the loess is of ^olian origin, and 
that it was deposited principally in forests and to a lesser 
extent in dense growths of smaller plants, while proportion- 
ately small quantities only were carried directly into the waters 
and there deposited. 
PERFECT FLOWERS OF SALIX AMYGDALOIDES ANDS. 
B. SHIMEK. 
A native specimen of Salix amygdaloides Ands. growing in 
Iowa City, produces peculiar flowers which seem to be worthy 
of mention. 
Whereas all Salicaceae habitually produce dioecions’''flowers, 
this specimen has, for at least three successive seasons, borne 
flowers most of which are perfect. 
The accompanying figures will give a clearer idea«of these 
peculiar flowers . 
The hairy bract is shown at the extreme left; next to this. is 
the narrow dark honey- gland (there are really three such glands 
in line in each flower) here occupying an unusual position, as 
in willows the honey-gland is normally in the axibof the pedi- 
