IOWA ACADEMY OF SCIENCES. 197 



Q. marylandica Muench. Decatur county. Uplands; a fre- 

 quent shrub associated with Q. nigra L. 



Salicace^. 



Salix nigra Marsh. Decatur, Page, and Fremont counties. 

 Along streams; common. 



S. long if alia Muhl. Ringgold, Taylor, Page, and Fremont 

 counties. Rich soil; frequent. 



S. humilis MsbYsh. Taylor county. Dry uplands; frequent. 



S. amygclaloides Anders. Page and Fremont counties. Rich 

 low lands; common. 



*S'. cordata Muhl. Page and Fremont counties. Low lands; 

 common. 



-S'. alba vitellina Koch. Decatur county. Becoming fre- 

 quent. 



Popuhis tremuloides Mx. Union and Ringgold counties. 

 Thickets; frequent. 



P. monilifera Ait. Clarke, Union, Adams, Montgomery, 

 Ringgold, Taylor, Fremont, Lucas, and Monroe counties. Low 

 lands; frequent. 



Conifers. 



Juniperus virginiana L. Decatur county. A small shrub 

 found in upland woods. 



Orchidace^. 



Sjnranthes cernua Richard. Johnson county, several speci- 

 mens found in moist places; Decatur county, a single specimen 

 found in prairie upland. 



S. gracilis Bigelow. Decatur county. About forty speci- 

 mens found in upland prairie grass. 



Gypripedium parviflorum Salisb. Decatur county. Rich 

 woods; associated with C. pubescens Willd., but much less fre- 

 quent. 



C. pubescens Willd. Ringgold county. Rich uplands; fre- 

 quent. 



C. spectabi'e Swartz. Jefferson county. Swampy soil; 

 rare. Specimens were transplanted with with good results. 



Iridace^. 



Iris versicolor L. Union, Ringgold, and Page counties. 

 Swamps; ponds; frequent. 



Belaiiicanda chinensis Adans. Ringgold, Taylor, and Page 

 counties. Waysides; waste places; becoming frequent. 



