46 



35. Culms 3-4 ins. or/ rarely longer. Blades flat, J-1 in. long. 



P. densifolia. 



Culms 9-18 in. long. Blad-es 2-6 in. long, flnely filiform 



or setaceous , 36 



36. Both valves awned; lobes truncate P. filiformis. 



Lower valve awnless (usually); lobes acute 



P. imperfecta. 



37. Glabrous. Lobes passing into bristles. Awn short and 



fme P. brachyathera. 



Valves usually hairy. Lobes distinct from the bristles. 

 • Awn kneed and exserted 38 



38. Panicle 1-3 in. long. Pedicels short P. Uiunbergil. 



Panicle 5 in. long. Pedicels long and fme ... P. longipes. 



PHALARIS. 



Annual. Keels of glume conspicuously winged ... 



P. minor. 

 Perennial. Keels of glume not or obscurely winged. . 



P. arundinacea. 



POA. 



1. Annual or sub-perennial. Anthers less than J lin. long. 



P. annua. 

 Perennial. Anthers 1 or more lin. long 2 



2. Bulbous at the base. Leaves of barren shoots often 



filiform P. bulbosa. 



Not bulbous. Leaves not finely filiform 3 



3. Valves glabrous or almost so, not connected by wool. 



Basal sheaths breaking up into fibres ... P. liinata. 

 Valves connected by long copious wool 4 



4. Spikelets elegantly variegated. Branches of panicle 2 



nate. Panicle lax P. atherstonei. 



Spikelets not or scarcely variegated. Branches of panicle 

 3-6 nate 5 



5. Culms compressed. Valves minutely 2 toothed ... 



P. bidentata. 

 Culms terete or sub-compressed below. Valve entire. 



P. trivialis. 



POLLINIA. 



Perennial. Culms erect. Veld plant P. villosa.- 



Annual. Culms delicate, decumbent, rooting. Bush plant. 



P. niida. 



