82 THE AMERICAN MIDLAND NATURALIST 



Stnilax hispida Muhl. Greenbriar. 



Woods and thickets. Common. June 5. 



Iridaceae. Iris Family. 



Sisyrinchium angustifolium Miller. Blue-eyed Grass. 

 Prairies. Common. Apr. 25 (26). 



Orchidaceae. Orchid Family. 



Gyrostachys cernua (L.) Kuntze. Nodding Ladies' Tresses. 

 Manhattan. Prairies. Occasional. Aug. 5. 



Salicaceae. Willow Family. 



Populus deltoides Marsh. Cottonwood. 



Woods, ravines, occasionally on hills and often planted. 

 Common. Mar. 30 (Apr. 1). 



Salix amygdaloides Anders. Peach-leaved Willow. 



Moist soil; woods and along creeks. Common. Apr. 20(19). 

 Salix cordata Muhl. Heart-leaved Willow. Pussy Willow. 



Moist Places. Occasional. Apr. 5 (3). 

 Salix interior Rowlee. Sandbar Willow. 



River banks and other moist places. Common. May 5 (3). 



Juglandaceae. Walnut Family. 



Juglans nigra L. Black Walnut. 



Woods. Common. May 5 (5). 

 Hicoria minima ,(Marsh.) Britton. Bitter Nut. 



Woods and wooded ravines. Common. May 30. 



Betulaceae. Birch Family. 



Ostrya virginiana (Mill.) Willd. Iron-Wood. 



Manhattan. Common on wooded hillsides. Apr. 15 (15). 



Fagaceae. Beech Family. 



Quercus velutina Lam. Black Oak. 



Manhattan. Common on hills eastward. 

 Quercus marylandica Moench. Black Jack or Barren Oak. 



With the proceeding. 

 Quercus macrocarpa Michx. Bur Oak. 



Woods and hillsides. Common. Apr. 25 (24). 

 Quercus acuminata (Michx.) Houda. Chestnut or Yellow Oak. 



Hillsides. Common at Manhattan, occasional at Blue 

 Rapids. Apr. 25 (23). 



