SYNOPSIS OF GENERA. XXI 



TEIBE X. Chloridese.— Spikelets 1— many-flowered, sessile, 

 arranged in two rows along the rachis of the unilateral spike. 

 Rachis neither jointed nor notched (as in tribe Ilordece). In- 

 florescence similar to that of Paspalum. Lowest or single 

 perfect floret hermaphrodite. Awn when present terminal and 

 straight, not dorsal or twisted as in Avenece. Rachilla usually 

 produced beyond the florets. 



* One fertile floret in each spikelet, rarely two. 



Spikes at the summit of the peduncle, 1 — 4. Spikelets 

 with long capillary awns. Rachilla not produced beyond 

 the florets. Flowering glume much shorter than the 

 empty ones. 



SCHCENEFELDIA, p. 52. 



Spikes 2 — 6 slender, digitate at the summit of the pedun- 

 cle. Spikelets small, 1-flowered, without awns. Ra- 

 chilla produced beyond the floret into a small point or 

 bristle. (Dub grass-). (Vide Plate E., Fig. 27). 



Cynodon, p. 52. 



Spikes usually crowded at the summit of the peduncle, 

 or in verticils, Flowering glume with a few empty 

 glumes above it, usually awned, 1 — 3-nerved. 



Chloeis, p. 53. 



Spikelets forming numerous short scattered clusters 

 which fall off at the joints. The two lower empty 

 glumes are clothed with long feathery hairs. Flower- 

 ing glume with three awns. Upper empty glumes 

 decreasing in size upwards, A small elegant an- 

 nual. 



Melanocenchris, p. 54. 



** Two or more fertile florets in each spikelet. 



Spikes 1 — 3, at the top of the peduncle, erect, covered 

 with long silky hairs. Spikelets crowded, 3 — 4-flow- 

 ered. Flowering glume awned. 



Tetrapogon, p. 55. 

 Spikes scattered along the peduncle. Spikelets 1 — 3- 

 flowered. Flowering glumes bluntish, much shorter 

 than the somewhat awned lower empty glumes. (Vide 

 Plate F., Fig. 28). 



DlNEBRA, p. 55. 



Spikes digitate or verticillate. Spikelets many flowered, 

 sessile, crowded, flattened, unilateral. Flowering glumes 



4 1 



