136 POACEAE 



58. Diplachne Beauv. 

 1. D. maritima Bicknell. Brackish marshes and shores: Mass. to 

 S. Car., also on the shore of Onondaga Lake, N. Y. 

 Throughout the coastal part of our range; not common. 



59. Aira L. [Molina Schrank.] 



1. A. coerulea L. On ballast: Me. to N. Y. Native of Europe. 



Rare as a weed. 



60. Eragrostis Beauv. 



Culms not creeping; plants with perfect flowers. 

 Annuals. 



Spikelets 2-5 flowered, 2-3 mm. long. 



Culms branched only at the base; pedicels and branches 



of panicle long and capillary. I. E.capillaris. 



Culms branched above the base; pedicels stout. 2. E. Frankii. 



Spikelets 5-many flowered, 4-16 mm. long. 

 Spikelets 1.5 mm. wide or less. 



Flowering scales thin, usually bright purplish, the 



lateral nerves faint or wanting. 3. E. pilosa. 



Flowering scales firm, usually dull purplish or 



green, the lateral nerves very prominent. 4. E. Purshii. 



Spikelets 2 mm. wide or more. 



Lower flowering scales about 1.5 mm. long. 5. E. Eragrostis. 



Lower flowering scales about 2-2.5 rnm. long. 6. E. megastachya. 



Perennial. 7. E. peclinacea. 



Culms extensively creeping; plants dioecious. 8. E. hypnoides. 



i. E. capillaris (L.) Nees. In dry places: N. H. to Kan., south 



to Ga. and Tex. 



Conn. Scattered throughout the state, most common in the south- 

 west. 



N. Y. In Manhattan, the Bronx, and Westchester counties, and 

 at Aqueduct, L. I. 



N. J. Camden and Gloucester counties, increasing northward; 

 not in the pine-barrens. 



Pa. Monroe, Northampton, Philadelphia, Delaware and Chester 

 counties. 



2. E. Frankii Steud. In moist places: Mass. to Minn., Miss., 



La. and Kan. 

 Conn. Rare and local. 

 N. J. Philipsburg. 



Pa. Monroe, Northampton, Bucks, Philadelphia and Chester 

 counties. 



