130 POACEAE 



Tertiary, unknown on Beacon Hill, rare elsewhere: Cretaceous, 

 scattered: Older Formations, increasing northward. 117-220 days. 

 Sea level-3,365 ft. 

 8. A. oreophila Trin. Newf. south to the mountains of N. Eng., 

 N. Y. and N. Car. 



Known in our area only from Mt. Beacon, near Fishkill, N. Y., 

 and as a waif from near Easton and Bethlehem, Pa. 

 Agrostis antecedens Bicknell, a recently described species, has been collected on L. I. 

 and S. I. and on the serpentine barrens in Delaware and Chester counties, Pa. 



37. Calamagrostis Adans. 



Prolongation of the rachilla hairy its whole length. 



Panicle open, the lower rays widely spreading. I. C. canadensis. 



Panicle more or less contracted. 2. C. inexpansa. 



Prolongation of the rachilla hairy only at the summit. 3. C. cinnoides. 



i. C. canadensis (Michx.) Beauv. In swamps and wet soil: 

 Newf. to Br. Col., south to N. Car., N. Mex. and Cal. 

 Throughout the range, except the pine-barrens. 



2. C. inexpansa A. Gray. In bogs: N. Y. and N. J. to S. Dak. 



and Colo. 



N. J. Reported, but the record not verified. 

 Pa. Known only from Pocono, Monroe Co. 

 A rare and local species. 



3. C. cinnoides (Muhl.) Scribn. (C. Nuttalliana Steud.). In 



moist soil : Me. to Ohio, south to Ga. and Ala. 



Common throughout the range. 



Calamagrostis Langsdorfii (Link) Trin. and C. hyperborea Lange, both of which 

 should be expected in the area, have not been recorded. Calamagrostis Pickeringii 

 Gray has been reported as collected at Valley Stream, L. I. 



38. Ammophila Host. 



I. A. arenaria (L.) Link. In sands of the sea-coast: Newf. to 

 N. Car. and inland along the shores of the Great Lakes. 

 Also in Europe. 



Common throughout the coastal dunes. 



39. Calamovilfa Hack. 



1. C. brevipilis (Torr.) Hack. In pine-barren swamps: N. J. 



Not uncommon in the pine-barrens of N. J., unknown elsewhere. 

 Endemic in our area. 



