012 CXLVII. ORAMINEiE. 



Spikelc^s in (Icciduoiis arLiculatc clusters 54. Guacii.ea. 



Spikelets uot clustered. 



Spikolets 1-fluwered or with one hei-inuphrodite and 

 1 or more male or barren florets. 

 Spikelets 1-llowered, awnles's. 



S])ike solitary, terminal ; iiivol.-fj;lunies longer 



thau the ciliiite inombranims Ikiral gluino fii^. MicitO( hmia. 



Spikes digitate ; invol. -glumes slicirter than the 



glabi'oiis subchartaceous floral glume 50. CvxtmoN. 



Spikelets with 1 hermaphrodite flower, the others 

 male or barren, usually awned, in digitate or 



fascicled spikes 57. CiiLonis. 



Ilcruiaphrodite fliirets 2-many in each spikclet 

 (Kometimes reduced to 1 in Triporjon 2MKpc>'cuius). 



Spikelets crowded on a solitary spike 58. TuironoN. 



Spikes digitate or whorled 59. Emousine. 



Spikes in narrow pyramidal racemes (iO. Dinkkua. 



Tribe 12. PAPPOPHOREiE. Floral glumes broad, 5-inany-nervecl, 

 olel't idto 3-many subulate lobes with or without alternating liiie 

 straight awus from the sinuses. 



Floral glumes 9-cleft 61. Enneai'ogon. 



Tkibe 13. ORYZEJE. Si)ikelots all alike or more or less hctei-o- 

 niorphous and unisexual. Fertile floret i, awned or uot, terminal 

 with 2 minute empty florets (floral glumes) below it or solitary. 

 Invol. -glumes very minute or conlluent into an annular rim or suppressed. 

 Palea 3-9-nerved. 8tamens usually 6 (rarely more), or 1-3. 



A floating glabrous grass ; spikelets awnod 62. Hygrokhiza. 



Leafy tall grasses, not floating ; spikelets usually awnless. 

 Keels of floral glume and palea pectinately ciliate ; 



spikelets awnless G3. Lerrsia. 



Keels of floral glume and palea not pectinately ciliate ; ^ 



spikelets rarely awned 64. Oryza. 



Tbidb 14. FESTUCE.ffi. Involucral glumes more or less resembling 

 the floral ones in general appearance. Fruiting florets 2 to many 

 (very rarely 1), often much exserted from the glumes. Floral glumes 

 5- or more-nerved (rarely 1-3-nerved). Awus, if present, terminal or 

 eubterminal, never geniculate. 



Leaves broad, tessellately nerved ; fruiting glumes with 



reflexed submarginal tubercle-based bristles 6r>. Ci:ntotueca. 



Loaves narrow, not tessellately nerved ; fruiting glumes 

 witliout submarginal bristles. 

 Leaves reaoliing 12 in. long or more, flaccid ; inflores- 

 cence in long, often intorrujited cylindric spikes Oil. Ei.YTuornouus. 



Loaves less tlian 2 in. long, i-igid, pungent ; inflorescence 



iu short subcapitate spikes 67. yEi.vuopus. 



Tnnuo 15. HORDE.ffi. Spikelets sessile, singly or in flusters, more 

 or less sunk in the hollows of the rhachis of a simple spike. Florets 

 1 or more. 



Spikelets solitary at the nodes of. the spike with their plane 



radial to the rhachis. Florets 1-3 08. Okoi'etium. 



B. Blades of haves transiwrseli/ veined and articulate on the sheath. 



Till in; 16. BAMBUSE.ffi. Shrubs or trees. Spikelets all of one 

 kind. I'lorets few to many (rarely 1). Lower 2 or more ghnnes 

 • nipfy, gratlually iiicrcasing in size up to the flowering, with sometimes 



