GRAM IN E A3. 45 



32. AMMOPHILA Host. 

 1. Ammophoa arenaria (L.) Link. Sea Sand-reed. M. p. 114. Sandy 

 beaches. Summer. 



33. CALAMOVILFA Hack. 

 1. Calamovilfa brevipilis (Torr.) Hack. Seed-grass. M. p. 114. Sandy 

 swamps in pine barrens. Late summer. 



34. APERA Adans. 

 1. Apera Spica-venti (L.) Beauv. M. p. 115. Ballast. Summer. 

 Philadelphia— Ghaxi Point, 7. Burk (He.). 

 Camden— Kaighn's Point, 7. Burk (Fu.). 



35. HOLCUS L. 

 1. Holcus lanatus L. Meadow Soft-grass, Velvet-grass. M. p. 115. 

 Fields, meadows and waste places. Summer. 



36. AIBA L. Hair-grass. 



Panicle open; flowering scales about 2 mm. long; plants 10-25 cm. tall. 



' 1. A. caryophyllea. 

 Panicle contracted; flowering scales 3 mm. long; plants 5-8 cm/. tall. 



2. A. praecox. 



1. Aira caryophyllea L. M. p. 115. Fields and' waste places. Early 



summer. 

 Philadelphia— Girard Point, (Te.). 

 Salem— Salem (C). 

 New Castle — Townsend and State Road, Cariby; Deakynes, Commons. 



2. Aira praecox L. M. p. 116. Dry fields. Early summer. 



Lehigh — Salsburg (Kr.). Northampton— Bethlehem (P.). 



Burlington— Medford (St.). Camden— Camden, Mart. (B. C), Glouces- 

 ter (C). Gloucester — Mullica Hill, Berkley (C), Mickleton, Timber 

 Creek (He.). Cape May— Cape May (C), Wildwood (He.), Anglesea 

 (Li.). Atlantic— Somers Point (C). 



Aira canescens L. Ballast. Philadelphia— Greenwich Point (Te.). 



Aira coarctata Ehrh. Ballast. Camden— Kaighn's Point (He.). 



37. DESCHAMPSIA Beauv. Hair-grass. 



Flowering scales about 2.5 mm. long, erose-truncate ; leaves flat. 



1. D. caespitosa. 

 Flowering scales about 4 mm. long, acute or obtuse; leaves involute. 



2. D. flexuosa. 



1. Deschampsia caespitosa (L.) Beauv. M. p. 116. In wet soil. Summer. 



7?i«*s-^Durham, Ruth (Fr.). Chester— (P.). Lancaster— {P.). 



2. Deschampsia flexuosa (L.) Trin. M. p. 116. In dry places. Summer. 



38. TRISETTJM Pers. 

 1. Trisetum Pennsylvanicum (L.) Beauv. False Oat. M. p. 117. Low 

 grounds. Early summer. 



