46 



35. Culms 3-4 ins. or rarely longer. Blades flat, h-i in. long. 



I\ densifolia. 



Culms 9-18 in. long. Blades 2-6 in. long, finely filiform 



or setaceous 30 



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 



fine P. brachyathera. 



Valves usually hairy. Lobes distinct from the bristles. 

 Awn kneed and exserted 38 



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



Panicle 5 in. long. Pedicels long and fine ... 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 \ 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. binata. 

 Valves connected by long copious wool 4 



4. Spikelets elegantly variegated. Branches of panicle 2 



nate. Panicle lax P. atherslonei. 



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. mida. 



