I48 POACEAE 



12. B. brizaeformis Fisch. and Mey. In waste places: Mass. to 

 Mich., Del. and Ind., also from Br. Col. to Cal. and Colo. 

 Native of Europe. 

 Not common as a weed. 

 B. rubens L., B. maximus L. and B. breviarislatus (Hook.) Buckl. occur as occa- 

 sional waifs. B. erectus Huds. and B. inermis Leyss. are sparingly introduced. 



73. Lolium L. 



Empty scale shorter than the spikelet. 



Flowering scales awnless. I. L. perenne. 



Flowering scales awned. 2. L. multiflorum. 



Empty scale equalling or extending beyond the flowering scale. 3. L. temulentum. 



i. L. perenne L. In waste places or cultivated grounds: almost 

 throughout N. Am. Naturalized from Europe. 

 Not uncommon as a weed. 



2. L. multiflorum Lam. In fields and waste places: N. Y., N. J., 



Mo. and Iowa. 



Locally common as a weed. 



3. L. temulentum L. In waste places and cultivated grounds: 



N. B. to Mich., Ga. and Kan. Native of Europe. 

 Rare as a weed. 



74. Agropyron J. Gaertn. 



Culms not densely tufted; plants with creeping rootstocks or stolons. I. A. repens. 

 Culms densely tufted; plants with no rootstocks or stolons. 



Awn shorter than the flowering scale. 2. A. biflorum. 



Awn much longer than the flowering scale. 3. A. caninum. 



i. A. repens (L.) Beauv. In fields and waste places: almost 

 throughout N. Am. except the extreme north. Native of 

 Europe. 



Common throughout the range. 



2. A. biflorum (Brig.) R. & S. In fields, etc.: N. S. to Br. Col., 

 south to the mountains of N. Eng., N. Y. and Pa., and in the 

 Rocky Mts. to Colo. Also in northern Europe and Asia. 



Known from near the summit of "Round Top," near Cairo, 

 Greene Co., N. Y., a peak north of the moraine, with an elevation 

 of about 3,500 ft., and a growing season of about 118 days; also at 

 High Point, Sussex Co., N. J. 



