15 



55. Inflorescence of 2-5 stout racemes 



Axoiiopus semialatus var. ecklonii. 



Inflorescence a loose (rarely contracted) panicle. (See 



also 12) Paiiicuni. 



56. Glumes awned 57 



Glumes awnless or shortly mucronate 59 



57. Valve i nerved Peiotis laliliolia. 



Valve more than i nerved 58 



58. Glumes persistent, gradually passing into the awn. (See 



also 64) Agi'ostis polypogonoides. 



Glumes deciduous, emarginate, with an awn from the 

 sinus Polypogon. 



59. Valves awned 60 



Valves awnless 66 



60. Awns of valve 3, or 3 branched Aristida. 



Awns of valve solitary 61 



61. Floret exserted from the glumes Pseudobromus aivicaiius. 

 Floret not exserted from the glumes 62 



62. Nerves of valve parallel, not joining at the lip, often 



slightly excurrent 63 



Nerves of valve closely approaching or joining at the 

 tip 6o 



63. Glumes covered with long soft hairs ... Lagurus o\atus. 

 Glumes not covered with long soft, hairs 61 



64. Valve decurrent into a callus, which has hairs several 



times longer than the valve itself 



Calamagrostis epigeios var. capensis. 

 Callus glabi'ous or minutely hairy: (See also 58 and 70)... 



Agrostis. 



65. Awn kneed Stipa. 



Awn straight or Oi-yzopsis miliacea. 



66. Lower glume minute or 0. Upper glume with hooked 



spines or bristles Tragus. 



Both glumes distinct, not spiny nor with bristles ... 67 



67. Valve decurrent into a callus, which is conspicuously 



hairy Ammophila arundinacea. 



Callus, if present, not conspicuously hairy 68 



68. Valve more than 3 nerved ...• 69 



Valve 3-i nerved 70 



69. Valve faintly 7 nerved, silky villous. Poagrostis pusllla. 

 Valve faintly 5 nerved, smooth. (See also 64) ... 



Agrostis verficillata. 



