482 98. 



ft SpikdeU quite sessile. 



I Glumes 2. 



46. TRITICUM. Spikelets solitary. Gl. opposite, nearly 

 equal, many-flowered, their edges towards the rachis. 

 Inner pale minutely ciliate on the ribs. 



47. ELYMTTS. Spikelets 2 or 3 together. GL 2, both on the 

 same side of the spikelet, ivithout awns or bristles, with "2 

 or more perfect flowers. 



48. HORDEUM. Spikelets in threes, often partially barren. 

 GL 2, ending in long bristles ; 1 perfect flower and a stalk- 

 like rudiment. 



49. LEPTURUS. Spikelets solitary, imbedded alternately on 

 opposite sides of the rachis. GL 1 2, both on the same 

 side of the spikelet, cartilaginous, covering the one fl. and 

 superior rudiment. Pales scarious. Stigmas feathery. 



44 Glume solitary, bractlike, or a very small second glume. 



50. LOLIUM. Spikelets solitary, placed edgewise on the rachis. 

 Gl. solitary, or that next the rachis very small, with 3 or 

 more flowers. 



Suborder I. Clisanthea. Tribe I. Paniceae. 



1. DIGITA'EIA Adans. 



[D. sanguindlis (Scop.) ; 1. and sheaths hairy, fl. oblong-lan- 

 ceolate glabrous with downy margins (?). IE. B. 849. P. 70. 

 St. ascending, a foot long. Not a native. A. VIII.] E. 



1. D. humifusa (Pers.) ; 1. and sheaths glabrous, fl. ovate 

 downy with glabrous veins. E. B. S. 2613. P. 71. St. mostly 

 procumbent, 4 8 in. long. Spikes usually 3 or 4, springing 

 from nearly the same point. Spikelets in pairs, one on a longer 

 stalk than the other. Sandy fields, rare. A. VII. VIII. E. 



2. ECHJNOCH'LOA Pal. de Beauv. 



[E. Crus-yal'li (Beauv.) ; spikes alternate or opposite, spike- 

 lets near together, upper gl. and sterile floret awned or mucro- 

 nate hispid, rachis hispid. E. B. 876. P. 67. Panicum L. 

 Kear London. A. VIL] E. 



