PAPILIOXACEAE 139 



2. Parosela dalea (L.) Britton. 

 Dalea alopecuroides Willd. 



Common on prairies in the eastern and central parts of the state. At- 

 kinson; Bellevue; Franklin; Kearney; Keya Paha County; Republican; 

 Saunders County; Seward. 



3. Parosela aurea (Xutt.) Britton. 



Dry gravelly soil mostly in the northern part of the state. Deuel 

 County; Franklin; Long Pine; Niobrara; Scotts Bluff County; Val- 

 entine. 



21. Kuhnistera (Petalostemon.) 546. 



Densely villous or silky-pubescent all over, leaflets 9-17. 1. K. villosa. 

 Glabrous or nearly so, leaflets 3-9. 



Flowers purple, leaflets 3-5. 2. K. purpurea. 



Flow^ers white, leaflets 3-9. 



Calyx densely silky-villose. 3. K. compacta. 



Calyx glabrous or nearly so. 



Leaflets lanecolate or oblong, 15-25 mm. long, 3-6 mm. wide. 



4. K. Candida. 



Leaflets linear or nearly so, mostly less than 20 mm. long. 2-4 



mm. wide. 5. K. oligophylla. 



1. Kuhnistera villosa (Xutt.) Kuntze. Hairy Prairie Clover. 

 In dry soil, common in the sand-hills. Foster; Kearney; Mullen; Pish- 

 elville; Thedford; Valley Junction; Royal; Valentine. 



2. Kuhnistero purpurea (Vent.) MacM. Purple Prairie Clover. 

 Common in prairies throughout the state. Brown County; Dannebrog; 

 Deuel County; Kearney; Lincoln; Plummer Ford; Sioux County; 

 Weigand. 



3. Kuhnistera compacta (Spreng.) Kuntze. 



Rare in the western part of the state. Scotts Bluff County. 



4. Kuhnistera Candida (Willd.) Kuntze. White Prairie Clover. 

 Common in rich soil in the eastern and central part of the state. 

 Crawford; Brown County; Fairbury; Haigler; Kearney; Lincoln; 

 Xiobrara. 



5. Kuhnistera oligophylla (Torr.) Heller. 



Common in sandy places in the central and western parts of the state. 

 Ashton; Callaway; Sioux County. 



22. Apios. 569. 



1. Apios tuberosa ^Moench. 

 Apios apios (L.) MacM. 

 Common in rich soil in the eastern part of the state and extending 

 along streams farther west. Keya Paha County; Peru; Platte River; 

 Plum.mer Ford; Valentine. 



23. Strophostyles. 571. 



Leaflets broadly ovate, often lobed, pods slightly pubescent. 



1. S. helvola. 

 Leaflets lanceolate, or linear oblong, entire, pods very pubescent. 



2. S. pauclflora. 



