POACEAE: FESTUCEAE 31 



Branches of the inflorescence reflexed or drooping, with 2-4 

 spikelets. 

 Branches of the inflorescence few, single or in pairs. 



5. P. reflexa. 

 Branches of the inflorescence many, in whorls of 4 to 7. 



6. P. sylvestris. 

 Flowering scales with 3 prominent nerves, the intermediate 

 faint or obsolete. 

 Branches of the inflorescence bearing spikelets above the 

 middle, 

 4 dm. or less tall; panicle rarely over 15 cm. long. 



2. P. nemoralis. 



6-10 dm. tall; panicle over 20 cm. long. 3. P. flava. 



Branches of the inflorescence bearing spikelets only at the 



ends. 7. P. alsodes. 



Flowering scales without cobweb-like hairs at the base of the 



flowers. 



Spikelets decidedly flattened; flowering scales acute. 



8. P. pseudopratensls. 

 Spikelets but slightly flattened; flowering scales rounded at 

 the apex. 

 Flowering scales scabrous all over. 10. P. confusa. 



Flowering scales scabrous above; strigose on the lower por- 

 tion. 

 Flovv'ering scales ovate, not longer than the empty scales. 



11. P. pratericola. 

 Flowering scales oblong, longer than the empty scales. 



12. P. buckleyana. 



1. Poa annua L. Low Spear Grass. 

 Reported from Lincoln. 



2. Poa nemoralis L. 



In the western part of the state. Belmont; Johnstown, 



3. Poa flava L. 



Poa serotina Ehr. 

 Bordeaux; Chadron; Crawford; Dismal River. 



4. Poa pratensis L. Kentucky Blue-grass. 

 Commonly cultivated but often escapes, especially in the eastern part 

 of the state. Ashland; Halsey; Xemaha; Thedford; Valentine. 



5. Poa reflexa V. & S. 

 Norfolk. 



6. Poa sylvestris A. Gray. 

 Long Pine. 



7. Poa alsodes A. Gray. 



In woods in the northw^estern part of the state. War Bonnet Canon. 



8. Poa pseudopratensls Scrib. & Rydb. 



In the w^estern part of the state. Deuel County; Thedford. 



9. Poa compressa L. Canada Blue Grass. 

 Over most of the state but not common. Basset; Chadron; Kennedy; 

 Lincoln; Sheridan County. 



10. Poa confusa Rydb. 



Nebraska according to Rydberg's Flora of Colorado. 



