386 97. GRAMINE.E. 



t Lower pale with nearly parallel veins which do not join to 

 form an awn. Awn 0. Styles terminal. 



Lower pale 2 3-fid. 



31. TRIODIA. Fl. 2 4. Lower pale rather coriaceous, 

 rounded on the back, bifid with an intermediate broad point. 

 Nut free. 



44 Lower pale nearly or quite entire. 



32. KCELERIA. Gl. unequal ; upper 2 3-ribbed. Spikelet 

 compressed, 2 5-flowered. Lower pale keeled, acuminate, 

 or with a straight subtenninal bristle. Nut free. 



33. MELICA. Gl. nearly equal, with lateral ribs, nearly as long 

 as the ovate spikelet consisting of 1 or 2 flowers rounded 

 on the back and a clublike rudiment. Pales hardening on 

 the free nut. 



34. MOLINIA. Gl. unequal, without lateral ribs, falling short 

 of the lanceolate spikelet of 2 or 3 semicylindrical flowers 

 and a subulate rudiment. Pales hardening on the free nut. 



35. POA. Gl. rather unequal. Lower pale 3 5-veined, 

 membranous below, scarious at the tip, compressed, keeled. 



36. GLYCERIA. Gl. unequal, submembranous. Lower pale 

 with 5 7 strong prominent ribs and a scarious margin, sub- 

 cylindrical. 



37. SCLEROCHLOA. Gl. unequal, membranous. Lower pale 

 with 5 faint veins, membranous, cylindrical below, often 

 keeled at the tip or with-a very minute mucro. 



38. BRIZA. Gl. nearly equal, broad, 3-ribbed. Fl. 38, 

 densely imbricated in a short distichous spikelet. Lower 

 pale boatshaped, heartshaped, obtuse, rounded on the back. 

 Gl. and pales membranous with a scarious margin. Fr. free. 

 Lower pale with 7 9 faint veins. 



44-i- Lower pale truncate and erose-denticulate. 



39. CATABROSA. Gl. unequal, very short, 1 -veined. Flowers 

 usually 2, rounded on the back, distant. Lower pale mem- 

 branous, with 3 veins ending in teeth which do not quite 

 extend to the edge of the scarious margin. Upper gl. often 

 with 2 short and faint lateral veins. 



ft Lower pale with converging veins, all or 1 3 of which 

 combine in the awn. 



40. CYNOSURUS. Gl. nearly equal, scarious, strongly keeled, 



