128 IOWA5 ACADEMY OP SCIENCES. 



Q. rubra L. Winneshiek, Allamakee, and Clayton Cos. 

 Uplands and lowlands, frequent. 



Q. coccinea Wang. Allamakee, Dubuque, Jackson, and Scott 

 Cos. Uplands, common. 



SALICACE^E. 



Salix humilis Marsh. Winneshiek -Co. Prairies, frequent. 



Populus tremuloides Mx. Winneshiek, Allamakee, and 

 Dubuque Cos. 



P. monilifera Ait. Winneshiek, Allamakee, Clayton, 

 Dubuque, Jackson, and Clinton Cos. Along streams, common. 



CONIFERS. 



Pinus strobus L. Winneshiek, Allamakee, and Clayton Cos. 

 Summit of bluffs along rivers, frequent. 



Juniperus cummunis L. Winneshiek, Allamakee, and 

 Dubuque Cos. Dry soil, frequent. 



J. virginiana L. Winneshiek, Allamakee, and Clayton Cos. 

 With the preceding. 



Taocus canadensis Willd. Winneshiek, and Dubuque Cos. 

 A decumbent bush under the pines. 



HYDROCHARIDACE^E. 



Elodea canadensis Mx. Winneshiek and Allamakee Cos. 

 Ponds, frequent. 



Vallisneria spiralis L. Scott Co. In Mississippi river. 



ORCHIDACE^E. 



Liparis liliifolia Richard. Winneshiek Co. 



Ooodyera pubescens R. Br. Winneshiek Co. One speci- 

 men noted. 



Habenari* bracteata R. Br. Winneshiek Co. Two speci- 

 mens found in deep woods. 



Cypripedium pubescens Willd. Winneshiek and Allamakee 

 Cos. Rich woods, frequent. 



IRIDACE^E. 



Iris versicolor L. Winneshiek and Allamakee Cos. Wet 

 places, frequent, 



Btlamcanda chinensis Adams. Dubuque Co. Frequent 

 along railway. 



