PAPILIOXACEAE 137 



17. Glycyrrhiza. 557. 



1. Glycyrrhiza lepidota Pursli. Wild Liquorice. 



Common on prairies all over the state. Cherry County; Hooker 

 County; Lancaster County; Newcastle; Sioux County; Thedford; Val- 

 entine. 



18. Psoralea. 542. 



Leaves mostly 5-foliate. some of the upper sometimes 3-foliate flowers 



mostly 1 cm. or m.ore long. 



Petioles much longer than the leaflets, the lower 2-4 times as long. 



Stems 1-4 dm. high, spikes 3.5-8 cm. long. 1. P. esculenta 



Stems hardly rising above the ground, spikes not over 2. .5 cm. long. 



2. P. hypogaea. 

 Petioles little if any longer than the leaflets. 



Flowers in loose spikes, stipules 1-2 cm. long. 1. P, cuspidata. 



Flowers sessile in dense heads, stipules .5-10 mm. long. 



Calyx lobes nearly equal, all much shorter than the corolla. 



4. P. digitata. 

 Calyx lobes very unequal, the lower 1 cm. long, longer than the 

 corolla. 5. P. argophylla. 



Leaves mostly 3-foliate. the lower sometimes 5-foliate, flow^ers 4-9 mm. 

 long. 

 Peduncles longer than the leaves, mostly several times as long. 

 Leaflets linear, 2-4 mm. mide. 9. P. linearfolia. 



Leaflets broader. 



Flow'ers sessile on the peduncles. 6. P. collina. 



Flowers stalked on the peduncles 



Flowers few, 1-2 to each bract, 4-5 mm. long. 



7. P. tenuifjora. 

 Flowers many, 2-3 to each bract, 5-7 mm. long. 



8. P. floribunda. 

 Peduncles aboat as long as the leavse, spikes few^ flowered. 



Leaflets filiform-linear. 11. P. micrantha. 



Leaflets narrowly oblong. 10. P. ianceolata. 



1. Psoralea esculenta Pursh. Pomme Blanch. 

 In high prairies throughout the state. Atkinson; Beatrice; Fairbury; 

 Gordon; Holdege; Ponca; Red Cloud; Sheridan County; Sioux County; 

 Thedford; Valentine. 



2. Psoralea hypogaea Nutt. 



Rare in the western part of the state. Alliance; Deuel County. 



3. Psoralea cuspidata Pursh. 



On dry bluffs and prairies, probably throughout the w^estern part of the 

 state. Dakota Junction; Grand Rapids; Valentine. 



4. Psoralea digitata Nutt. 



Common on prairies in the sand-hill regions. Anselmo; Grand Island; 

 Kearney; Long Pine; Norway; Phelps County; Sargent; Sheridan 

 County; Weigand. 



5. Psoralea argophylla Pursh. 



Common on prairies throughout the state. Belmont; Box Butte 



