148 CALAMGEOSTIS. 



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

 Name compounded of the Greek words Jcalamos, a 

 reed, and agrostis, a grass. 



1. 0. Canadensis (Blue Joint G-rass). Wet grounds). 

 Common northward. Flowers in July. A useful 



2. C. Langsdoriffi. Found on White mountains, 

 Kew Hampshire, and northward. 



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

 mont, and northward. 



4. C. Confinis or Inexpansa, Oray. IST. 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, Oray. Found in dry woods, Pulpit 

 Eocks and vicinity, Huntington county, Pennsyl- 

 vania. * 



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

 White monntains. New Hampshire. 



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

 barrens in New Jersey. Rare. Flowers in Sep- 

 tember. 



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

 with decidious wool. Sands along the upper Great 



