148 CALAMGROSTIS. 



root-stocks, and mostly tall and simple rigid culms. 

 Name compounded of tlie Gfreek words Icalamos^ a 

 reed, and agrostls^ a grass. 



1. C. Canadensis (Blue Joint Grass). Wet grounds). 

 Common northward. Flowers in July. A useful 

 grass. 



2. C. Langsdorfi'ii. Found on White mountains, 

 New Hampshire, and northward. 



3. C. Stricta. Ledges at Willoughby lake, Ver- 

 mont, and northward. 



» 



4. C. Confinis or Inexpansa, Gray. N. and W. 

 New York (especially Penn Yan), and Pennsylvania. 

 Flowers in July. 



5. C. Nuttaliana or Coaractata (Crowded Calama- 

 grostis). Moist grounds, E. New England to Penn- 

 sylvania, Virginia, and southward. Flowers in 

 August. 



6. C. Porteri, Gray. Found in dry woods. Pulpit 

 Rocks and vicinity, Huntington county, Pennsyl- 

 vania. 



7. C. Pickeringii, Gray. Found near Summit of 

 White mountains, New Hampshire. 



8. C. Brevipilis (Purple Bent). Swamps and pine 

 barrens in New Jersey. Rare. FJowers in Sep- 

 tember. 



9. C. Longifolia (Woolly Bent). Sheaths clothed 

 with decidious wool. Sands along the upper Great 



