40 THE BIOLOGY OF HARDING COUNTY 



18. CONVALLARIACEAE (Lily-of-the-Valley Family) 



103 Disporum tray chy carp-urn (Wats.) B. & H, 



Fairly numerous on shady slopes of Cave Hills and other 

 forested buttes. 



104 Smilacina stellata (L) Desf. 

 Common in and about open woods. 



19. SMILACEAE (Smilax Family) 



105 Neme.via herbacea (L) Small. 



Abundant in open deciduous woods of buttes and valleys. 



20. IRIDACEAE (Iris Family) 



106 Sisyrinchium an gusti folium Miller. Blue-eyed Grass. 

 Not common in draws on the plains. 



21. ORCHIDACEAE (Orchid Family) 



*io/ Limnorchis sparsiflora (Wats) Rydb. 



Common along the brooks of the Short Pines. 



108 Limnorchis viridiflora (Cham.) Rydb. 



Not uncommon in marshy spots in the shady wooded gulches 

 of the West Short Pine Hills. 



22. SALICACEAE (Willow Family) 



109 Populus angusti folia James. Narrow-leaved Popular. 

 Rare, along Soft Water Creek, near Redig. 



no Populus occidentals (Rydb.) Brit. Cottonwood. 



The cottonwood is the most widely distributed tree of this 

 section of the state. It occurs either singly or in groves along 

 all the larger streams, a diameter of over three feet is oc- 

 casionally attained. 



in Populus trcmnloides Michx. Quaking Aspen. 



Aspen thickets occur on talus slopes at the foot of cliffs and 

 locally in the box canyons of the forested buttes. 



112 Sali.\- amygdaloides Anders. Large Willow. 

 Frequent along the streams throughout. 



113 Sali.v Bcbbiana Sarg. 



Found at widely scattered localities. 

 *ii4 Sali.v Fendlcriana Anders. Bunch Willow. 



Common on boggy soil in the Forest Reserves and also the 

 Little Missouri River. 



