POACEAE 131 



40. Apera Adans. 

 1. A. Spica-venti (L.) Beauv. In waste places and on ballast: 

 Me. to southern N. Y. and Pa. Native of Europe. 

 Rare as a weed in waste places. 



41. Nothoholcus Nash. 



1. N. lanatus (L.) Nash. In fields, meadows and waste places: 



N. S. to Ont. and 111., N. Car. and Tenn. Also on the Pacific 

 Coast. Native of Europe. 

 Not uncommon as a weed. 



42. Aspris Adans. [Aira L. in part] 



Panicle open; flowering scales about 2 mm. long; plants 1.25-2.5 dm. 



tall. 1. A. caryophyllea. 



Panicle contracted; flowering scales about 3 mm. long; plants 5-10 



cm. tall. 2. A. praecox. 



i. A. caryophyllea (L.) Nash. In fields and waste places: Mass. 

 to Ohio and Va. Also on the Pacific Coast. Native of 

 Europe. 

 Rare as a weed in our area. 



2. A. praecox (L.) Nash. In dry fields: southern N. J. and Pa. 



to Va. Naturalized from Europe. 



Rare and local as a weed in southern N. J. and Pa. 



43. Corynephorus Beauv. 



1. C. canescens Beauv. In waste places: N. Y. and Mass. 



Native of southern Europe. 

 Rare on western L. I. 



44. Deschampsia Beauv. 



Flowering scales about 2.5 mm. long, erosc-truncate. 1. D, caespitosa. 



Flowering scales about 4 mm. long, acute or obtuse. 2. D. fiexuosa. 



i. D. caespitosa (L.) Beauv. Newf. to Alask., south to N. J., 

 111., Minn, and in the mountains to N. Mex. and Cal. Also 

 in Eu. and Asia. 



Throughout the range, except the coastal plain in N. J. and L. I., 

 there not recorded. 



2. D. fiexuosa (L.) Trin. In dry soil: Greenl. and Newf. to 



Ont., south to N. Car. and Tenn. 



Throughout the range, perhaps only adventive in the pine- 

 barrens. 



