442 POAC'E.E. 



rndimont simple or bifid; ompty fjlunics pilose, much shorter than 

 the spikelets; lloral fjliime densely hairy. 



Mexico, Palmer '200. I'ritKjJc 'Zhh\). lal)eled /*. tjendnata. 



Fig. 83. — Peniarrhaphia Fourni'erana. Spike si)reii(l open. (Scribner.) 



2. P. scabra IF. H. K. Nov. (ien. 1: 178, /. GO (1815). 

 Culms branching, taller; leaf-blades longer and broader; si)ike- 



lets only one at each node of the ra(.'lii.s, first empty glume and the 

 bristlelike rudiments scal)rous. Not seen by mo. 



3. P. paupercula (IVesl). Seribn. Bull. Torr. Club, 17:233 

 (1890). Pohjschisfis pavperevla Presl, Kel. Ha-nk. 1:294, /. 41 

 (1830). 



lilades of sterile shoots short, like those of the culms; spikelets 

 only one at each node of the rachis, the short pedicel of the second 

 floret pilose, Xot seen by mo. 



TRUiE XI.— FESTUCEJE. 



Spikelets 2- to many-flowered, very rarely 1 -flowered, in a spread- 

 ing, narrow or spikelike panicle, rachilla articulate or continuous, 

 usually produced above the upper floret or bearing 1 or more ter- 

 minal empty glumes. Empty glumes usually narrow, keeled, acute 

 or obtuse, shorter than the nearest floral glumes; floral glume 

 usually broader, entire, awnless or with 1- to many terminal (rarely 

 dorsal) straight awns; palca 2-keeled, usually as long as its glume or 

 nearly so. Embryo usually small. Griiin free from the paleaorad- 

 nate. A very large tribe containing the most im])ortant meadow- 

 grasses of cool I'egions. 



A. Spikelets usually few-flowered. Floral glumes divided 

 into 3 to many awns or lobes, or the awns dorsal. . . (a) 



