Dis 
9. Spikelets pubescent, some sparingly so. 
WAG 
WAP 
Spikelets 3 mm. long or more. 
13. Blades of leaves at midculm 15 times as 
long as wide. (Also, sheaths hispid or 
glabrous; spikelets pointed). Expected 
(P. depauperatum). 
13. Blades of leaves at midculm seldom over 
10 times as long as wide. (Also, 
spikelets 3.5-4 mm. long or more). 
14. Blades velvety-pubescent beneath. 
Expected (P. ravenelii, P. boscii v. molle). 
14. Blades not velvety-pubescent beneath. 
15. Sheaths glabrous or minutely 
puberulent. 
16. Nodes bearded; spikelets 4 mn. 
long or more. Expected 
(P. boscii). 
16. Nodes not bearded; spikelets 
about 2.8 mm. long....... eeeeee P. commutatum 
15. Sheaths bristly. (Also, blades 
2 em. wide or more)..... Re Fu eurelenettel aes P. clandestinum 
Spikelets less than 3 mm. long. (Also, blades 
usually over 5 mm. wide). 
17. Spikelets attenuate at base; blades 
tapering from base to apex. Expected 
(P. angustifolium). 
17. Spikelets not attenuate at base; blades 
otherwise. (Also, sheaths not retrorsely 
pilose). 
18. Ligule (1.5) 2-5 mm. long. 
19, Sheaths, or all but the lowest, 
glabrous. (Also, ligule 4-5 mm. 
long; spikelets 1.5 mm. long: leaf 
blades and axis of panicle glabrous 
or nearly so). Expected (P. lindheimeri). 
