POACEAE 125 



N. J. Rare in the region north and west of the pine-barrens, thence 



increasing northward. 

 Pa. Throughout. 



Tertiary, o: Cretaceous, rare: Older Formations, increasing 

 northward. 117-207 days. Sea kvel-3,668 ft. 



30. Heleochloa Host. 

 1. H. schoenoides (L.) Host. In waste places: southern N. Y. 

 to Del. and Pa. Native of Europe. 

 Not very common as a weed. 



31. Phleum L. 



1. P. pratense L. In fields and meadows: nearly throughout N. 



Am. Also in Eu. and Asia. 

 Common everywhere as a weed. 



32. Alopecurus L. 



Outer scales of the spikelet united for half their length; keel smooth 



to hispid. l. A. myosuroides. 



Outer scales of the spikelet united for one quarter their length, or 

 less, long ciliate on the keel. 

 Scales 2-2.5 mm - long- 

 Awn inserted at }i above the base of the flowering scale, 



exserted from the spikelet about 2 mm. 2. A. geniculatus. 



Awn inserted at or about the middle of the flowering scale, 



scarcely exserted. 3- A. aristulalus. 



Scales 4-6 mm. long. 4. A. pratensis. 



i. A. myosuroides Huds. In waste places and ballast: southern 

 Mass., N. Y., N. J. and Pa. Adventive from Europe. 

 Not uncommon as a weed. 



2. A. geniculatus L. In wet soil or on ballast: Newf. to Kan., 



south to Fla. and Tex. Also in Europe and Asia. 



Locally abundant as a weed but not definitely reported from L. I. 



3. A. aristulatus Michx. In wet meadows: Me. to Alask., Pa. 



and Cal. 



Scattered throughout our range, except the pine-barrens, always 

 with the aspect of a weed. 



4. A. pratensis L. In meadows: Newf. to southern N. Y., N. J. 



and Ohio. Naturalized from Europe. 

 Local as a weed, often wanting. 



