23 



Jour., Bom. Nat. Hist. Soc; Vol. XXXI V, No. 1 [March 1, 1930. 



{a) Spikelets minute, more or less 

 sunk in the rhachis, 1-3-flowered 

 (vol. 33, 753) ... ... 85. Oropetium. 



(b) Spikelets not sunk in the rhachis 

 A. Spikelets awnless, minute, 

 unilateral on flattened rhachis, 

 1-flowered (vol. 33, 753) ... 86. Microchloa. 

 b. Spikelets awned, 1-2-flowered in 

 deciduous articulate clusters 

 (vol. 33, 754) ... ... 87. Gracilea. 



ii. Spikes digitate (vol. 33, 753) ... 88. Cynodon. 



(2) Spikelets with several florets (Genera 

 89-93). 

 i. Spikelets with 1 (rarely 2, Chloris 

 sp.) fertile and 1 or several imperfect 

 florets above or below the fertile (see 

 also Microchloa) . 



(a) Spikelets in long secund solitary 



spikes ; floral glumes narrow, 

 firm, glabrous or scaberulous, 

 with a short erect awn from the 

 notched or subentire tips (vol. 

 33, 755) ... ... ... 89. Enteropogon. 



( b) Spikelets in digitate, rarely 



solitary or 2-nate spikes ; the 



florets much widened upwards, 



or if narrow, then delicate and 



usually with a fine awn from 



below the tips, often ciliate ; 



floral glumes or at least some of 



them awned, very rarely sub- 



muticous (vol. 33, 755) ... 90. Chloris. 



ii. Spikelets with 2 or more fertile florets 

 and without imperfections below 

 them (See also Chloris sp.) ; floral 

 glumes awnless or with a rigid mucro 

 or very short awn from the acumi- 

 nate tips {Dactyloctenium sp,), 

 entire or subentire (Genera 91-93). 



(a) Spikelets in digitate or subdigitate 



spikes. 



a. Spikes terminated byaspikelet; 



involucral and floral glumes 

 emucronate or obscurely 

 mucronate (vol. 33, 761) .. 91. Eleusine. 



b. Spikes terminating with a sharp 



point ; upper involucral glume 

 and floral glumes rigidly 

 mucronate or shortly awned 

 (vol 33, 760) ... ... 92. Dactyloctenium. 



(b) Spikelets in racemosely arranged 



spreading or deflexed, finally 

 deciduous spikes (vol. 33,763)... 93. Dinebra. 

 b. Floral glumes variously toothed or lobed 

 with the middle and side-nerves running 

 out into awns or mucros. 

 Spikes solitary and terminal on the culms ; 

 spikelets mostly olive- green or dark 

 greyish ; all 3 nerves or at least the 

 middle-nerve running out into a fine 

 short awn or mucro (vol. 33.764) ... 94. Tripogon. 



{ii) Floral glumes 5 to many-nerved, very 

 rarely 3-nerved (genera 95-104). 

 TRIBE XIII : Pappophorb,e. — Floral glumes broad 

 5-many-nerved, cleft into 3-many subulate lobes, 



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