IDENTIFICATION OF GEASSES. 7 



GROUP II. — Leaves rolled in the bud; shoot apparently cylindrical. 



A. Auricles narrow and clawlike. 



B. Sheaths reddish below ground ; blades- shining beneath. 

 C. Leaf margins smooth. 



14. Italian rye-grass (Lolium mulUflorum). 

 CC. Leaf margins rough. 



15. Meadow fescue (Festuca .elatior). 

 BB. Sheaths not reddish. 



C. Rootstocks present. 



16. Quack-grass (Agropyron rcpcns). 

 CC. Rootstocks wanting. 



D. Hairs on sheaths pointing downward. 



17. Virginia wild rye (Elymus virginicus). 

 DD. Hairs on sheaths pointing upward. 



18. Slender wild rye (Elymus striatus). 

 AA. Auricles wanting, or at least not clawlike. 



B. Sheaths not laterally compressed. 

 C. Collar or sheath hairy. 

 D. Sheaths not hairy. 



19. Sweet vernal grass (Anthoxanthum odo- 



ratum). 

 DD. Sheaths hairy. 



E. Collar not hairy. 



20. Soft chess (Bromus hordeaceus). 



(Note.- — Tall oat-grass sometimes has hairy 

 sheaths ; it would then be placed here.) 

 EE. Collar hairy. 



F. Rootstocks present. 



21. Switch-grass (Panicum virgatum). 

 FF. Rootstocks not present. 



22. Downy brome-grass (Bromus tectorum). 

 CC. Collar and sheaths not hairy. 



D. Rootstocks or stolons present. 



E. Sheaths dark violet below ground. 



23. Meadow foxtail (Alopecurus pratensis) . 

 EE. Sheaths pale below ground. 



F. Rootstocks more than one-eighth inch in diameter. 



24. Reed canary grass (Phalaris arundinaeea) . 

 FF. Rootstocks less than one-eighth inch in diameter. 



G. Leaves one-fourth inch wide. 



25. Redtop (Agrostis alba). 

 GG. Leaves one-eighth inch wide. 



26. Creeping bent (Agrostis stolonif era) . 

 DD. Rootstocks and stolons not present. 



E. Sheaths white, with pink nerves. 



27. Chess (Bromus secalinus). 

 EE. Sheaths without pink nerves. 



F. Margins of blades rough, retrorsely so near base. 



28. Timothy (Phleum pratense). 

 FF. Margins of blades smooth. 



G. Stems without bulbs below ground. 



29. Tall oat-grass (Arrlicnatherum elatius). 

 GG. Stems with bulbs below ground. 



30. Bulbous oat-grass (Arrhenatherum ela- 



tius bulbosum). 



