106 
IOWA ACADEMY OP SCIENCES. 
therefore, in this instance, change the commonly received 
name. Instead of Gornuvia circumscissa (Wallr.) R., we shall 
say Oi)Motlieca clirysosperina Currey, nnless we can show that 
Wallroth actually described the same thing, when, of course, 
we should write Ophiotlieca circumscissa (Wallr.), followed by the 
name of the author who first established the combination, in 
this case, Massee. 
ROTES ON THE FLORA OP WESTERN IOWA. 
BY L. H. PAMMEL. 
The flora of the loess in western Iowa is unique, in many 
respects. While it may be said that many parts of the state- 
have a typical prairie flora, certain species being common from 
Texas to British America, east to Wisconsin, Illinois and 
Indiana, only occasionally do we find plants of the great plains 
in our own state. Western species are somewhat unequally 
distributed in our state; they occupy a larger area in north- 
western Iowa than in southern and western. In northern 
Iowa a few prominent types appear, as in Emmet county. Of 
these I may mention Bouteloua oligostachya, Agropyrum caninum, 
A. caesium, Grinclelia squarrosa, Helianthus Maximiliani. The 
latter is not, however, a typical western plant, though intro- 
duced in central Iowa. It crosses our western border on the 
loess and extends south to Texas. 
The loess of western Iowa is peculiar so far as the flora is 
concerned, nothing like it in Iowa. A number of American 
writers have written upon the peculiarities of its plant life. B. 
P. Bush^ has given us a complete catalogue of the flora of 
northwestern Missouri. 
A. S. Hitchcock^ has reported a few of the plants occurring 
near Sioux City, and in general touches on the flora of western 
Iowa. 
J. W. McGee considers the loess flora of northeastern Iowa. 
The two regions are however not similar from a botanical 
standpoint. It may be well to speak of the formation in this 
iNotes on the mound flora of Atchison county, Miss )uri. Reprint, Sixth Ann, Rep. 
Missouri Botanical Garden, 1895, pp. 121-134. 
2Notes on the flora of Iowa, Bot. Gazette-Vol. XIV, p. 127 
