PAPILIONACEAE 131 



Shrubs. 19. Amorpha. 



Vines, leaflets sometimes only three. 22. Apios. 



Herbs, not climbing. 



Flowers in terminal spikes, ovules 2-3, pod 1-2 seeded in- 

 cluded in the calyx. 

 Stamens 9-10, wings and keel adnate to the filament tube 

 for half its length or less. 20. Parosela. 



Stamens 5, wings and keel adnate by their claws to fila- 

 ment tube to its top. 21. Kuhnistera. 

 Flowers axillary, on axillary peduncles or if in terminal 

 clusters the pod long exserted. 

 Flowers in terminal racemes, pods elongated linear. 



11. Cracca. 

 Flowers on axillary peduncles, pods short often much in- 

 flated. 

 Herbage not glandular punctate, pods smooth. 

 Keel of the corolla blunt, not appendaged. 



Pod not flattened, one or both sutures intruded. 



16. Astragalus. 

 Pod flat, both sutures prominent externally. 



13. Homalobus. 

 Keel produced into a point-like appendage. 



12. Aragalus. 

 Herbage glandular-punctate, pods prickly. 



17. Glycyrrhiza. 

 Leaves even-pinnate the rachis usually terminating in a tendril. 

 Style flattish, hairy on the upper side, stamen tube nearly trun- 

 cate at the apex. 27. Lathyrus. 

 Style filiform, hairy at the tip, stamen tube oblique at the apex. 



28. Vicia. 



1. Sophora. 534. 



1. Sophora sericea Nutt. 



Dry prairies mostly in the western part of the state. Cambridge; 



Cheyenne County; McCook; Minden; Red Cloud; Red Willow County; 



Wilsonville. 



2. Thermopsis. 534. 



1. Thermopsis rhombifolia (Nutt.) Richards. 



In sandy soil in the western part of the state. Deuel County; Ft. 



Robinson; Sioux County; Valentine. 



3. Baptisia. 535. 



Glabrous, bracts lanceolate, falling before the flowers open. 



1. B. leucantha. 

 Villous, bracts ovate, persistent. 2. B. bracteata. 



1. Baptisia leucantha T. & G. 



Rare in the southeastern part of the state. Crete; Leshara; Lincoln; 

 Nebraska City; Saline County. 



2. Baptisia bracteata Ell. 



Common on prairies in the southeastern part of the state. Beatrice; 

 Crete; Firbury; Lincoln; Peru; Wahoo. 



