43 



5. Culms pubescent or hirsute below the panicle. Blades 



very narrow. Panicle 2-4 in. long ... P. sphacelatum. 



Culms glabrous, smooth or scaberulous below the 



panicle. Blades 2-4 Iin. broad. Panicle up to 1 ft. 



long 6 



6. Panicles 3A-6 lin. thick. Spikelets 2-2£ tin. long ... 



P. macrourum. 

 Panicles about 3 lin. thick. Spikelets H-lf lin. long. 



P. nafalense. 

 PENTAMERIS. 

 1. Valves and pales very broad. Lobes of former broad, 

 short, dentate or abruptly subulate-acuminate ... 



P. thuarii. 



Valves and pales narrow. Lobes of former long, narrow, 



acute, adnate for £-f of their length to lateral 



bristles 2 



3. Panicle very lax, more or less open ... P. longiglumis. 

 Panicle narrow, contracted 4 



4. Spikelets 8-12 lin. long. Awn 9-li lin. long. Lobes of 



valve -*- as long as body P. speciosa. 



Spikelets 6J-7J lin. long. Awns about 6 lin. long. Lobes 

 of valve I as long as body P. dregeana. 



PENTASCHISTIS. 



1. Panicles eglandular. Spikelets more than 3 lin. long 2 

 Panicle or leaves or both gland-tubercled, or if eglandular 



then the spikelets less than 3 lin. long 18 



2. Blades i-U- in. long, more or less subulate 3 



Blades \-2 ft. long, filiform, convolute 5 



3. Annual. Spikelets 7-8 lin. long. Blades soft. P. triseta. 

 Perennial. Spikelets 3|-4i lin. long. Blades rigid... 4 



4. Axils of panicle long bearded P. aeinosa. 



Axils of panicle glabrous P. elegans. 



5. Basal sheaths at length breaking up into persistent fibres. 



Spikelets 3-4£ lin. long 6 



Basal sheaths not breaking up into persistent fibres... 7 



6. Blades setaceous, subterete, glabrous. Awns scarcely 



exserted P. tysoni. 



Blades up to 1 lin. broad when unfolded, pubescent above 

 the ligule. Awns exserted from the glumes ... 



P. fibrosa. 



7. Spikelets 3-4 lin. long 8 



Spikelets 4-8 lin. long 9 



4 



