IOWA ACADEMY OF SCIENCES. 
133 
SALICACE^. 
Salix Immilis Marsh. 
Sioux Cifcy, common on prairies and at base of loess mounds 
(L. H. P.). 
S. longifolia Mnhl. 
Sioux City (B. W.). 
Populus monilifera Ait. 
Missouri Valley, in bottoms near streams, in swales between 
loess mounds; occasionally near top of mound. Com- 
mon (L. H. P.), South Dakota, opposite Hawarden 
(L. H. P.); Sioux City (B. W.). 
CERATOPHYLLACE^. 
Cerato'pliyllum demersum L. 
Sioux City (B. W.). 
CONIFERS. 
Juniperus Virginiana L. 
Sioux Chy (B. W.). 
ORCHIDACE^. 
Orchis spcctdbilis L. 
Sioux City (B. W.). 
Habenaria leucophcea Gray. 
Cherokee fB. W.). 
Spirantlies ceriMa Richard. 
Smithland (B. !¥.). 
Gyprip)edium pubescens Willd. 
Cnerokee, Smithland (B. W.). 
IRDIACE^. 
Iris versicolor L. 
Sioux City (B. W.). 
LILIACE.E. 
Smilax herbacea D. 
Sioux City (B. ¥7.). 
Allium stellatum Fras. 
Alton, common on prairies (L. H. P.). 
A. Ganadense Kalm. 
Sioux City (B. W.). 
Yucca angusUfolia Pursh. 
Council Bluffs, Missouri Valley, Sioux City, Turin (L. H. 
P.); near top of loess, mounds common. South, north 
and west sides. Many seeds produced. Not all the plants 
which flower produce seeds — many empty stalks were 
found. It is a significant fact that this species does 
