100 



THE TRUE GRASSES. 



With a distinct, 

 bristle-like, naked 

 prolongation of the 

 rachilla. 



133. Chaetotropis. 



With a distinct pro- 

 longation of the 

 rachilla in the form 

 of a pencil of hairs. 

 135. Triplachne. 



SUB-TRIBE 1. Stipeae. 

 Fruiting glume more or less indurated, closely embracing the grain. 



100. (119) Amphipogon Brown (Gamelytrum Nees). 

 Inflorescence capitate, or a dense spike-like panicle with 

 numerous awns, even the palea having two long awns. 



Species five, in Australia. 

 Pentacraspedon Steud. belongs 

 here. 



101. (108) Aristida L. Pani- 

 cles usually expanded. Empty 

 glumes usually longer than the 

 flowering ones, the latter with 

 a pointed callus ; palea 

 shorter ; lodicules two. 



Species about one hundred, 

 in the warmer portions of both 

 hemispheres, very few in the 

 temperate parts of Europe and 

 Asia, but numerous in North 

 America. 



Sec. I. Chcetaria (Beauv. as 

 a genus). Awns naked, not 

 deciduous. A. ccpridescens Desf. 

 (Fig. 43), in South Europe and 

 North Africa. A. hygrometrica 

 in Queensland, is dangerous to 

 sheep (see page 30). Strep- 

 tachne Kunth ( Ortachne Nees) 

 has either no lateral awns or only very short ones. 



FIG. 43. Aristida ccemlescens Desf 

 (Trin., Spec. Gram. pi. 313.) 



