i8o THE FLORA OF THE ALPS 



larger, bristles russet-yellow; road-sides. 6". ambigua, 

 Guss., is possibly a hybrid. 



4. TRAGUS, Hall. 



Spikelets of two flowers, the lower neuter, the upper 

 bisexual. 



T. racemosus, Desf. ; spikelets in a linear racemose 

 panicle, with small hooked bristles, leaves ciliate; sandy 

 places ; Valais. 



Tribe 3. PHALARIDE^E. Spikelets compressed later- 

 ally ; glumes usually 6, uppermost only fertile ; pale o or 

 I -nerved. Not alpine. Genera 5-8. 



5. PHALARIS, L. 



Glumes 6, two of them imperfect, not awned; stamens 3. 

 P. arundinacea, L. ; panicle elongated, spreading and 

 red when in flower ; ditches. 



6. ANTHOXANTHUM, L. 



Glumes 6, two of them imperfect, awned ; stamens 2. 

 A. odoratum, L., Sweet Vernal Grass ; everywhere. 



7. HlEROCHLOE, Gmel. 



Glumes 6; upper flower bisexual with 2, two lower 

 flowers male with 3 stamens. 



H. borealis, R. and S.; flowering glumes shortly awned ; 

 water-sides, very rare ; Zurich, Einsiedeln. 



