GRAMINE^E 185 



branches wavy, awn slightly bent, leaves filiform ; wood- 

 sides, frequent. A. rhenana, Grml. ; similar, but spike- 

 lets much larger, panicle narrower ; Schaffhausen. 



C. Rachis not produced ; awn bent in the middle, with 

 swollen tip (Corynephorus, Beauv.): A. canescens, L. ; 

 caespitose, leaves short, rigid ; sandy places, rare ; Schaff- 

 hausen, Geneva, Dauphiny, Lombardy, Pyrenees. 



19. HOLCUS, L. 



Spikelets 2-flowered ; lower flower not awned, upper im- 

 perfect and awned ; stem and leaves very soft. Not alpine. 



Our two English species ; H. lanatus, L., tomentose, 

 awn short ; and mollis, L., villous at the nodes, awn very 

 long; are common meadow-grasses. 



20. TRISETUM, Pers. 



Spikelets 2-6-flowered ; glume deeply bifid, awned. 



T. flavescens, Beauv. ; panicle loose, spikelets often 

 violet ; meadows, common. T. distichopJiyllum, Beauv. ; 

 panicle loose, stem 4-6 in., leaves stiff, flat ; stony, 

 alpine. T. argenteum, Sch. ; panicle loose, stem up to 

 4 in., leaves setaceous, channelled ; stony, alpine ; Grimsel, 

 Ticino, Lombardy, Tirol, Styria, Carinthia, Salzburg. 

 T. subspicatum, Beauv. ; panicle spike-like, stem hairy 

 above, spikelets yellowish-green ; high, alpine. T. Gaudi- 

 nianum, Boiss. ; panicle spike-like, stem hairy above, 

 spikelets variegated with violet ; sandy places ; Valais. 



21. AVENA, L. 



Spikelets 2-6-flowered; flowering glume entire or bi- 

 dentate, with a long twisted awn. 



