56 FLOIiA OF PHILADELPHIA. 



New Castle — Low ground east of Thompson 's Swamp, Commons. 

 2. Agkopyron repens (L.) Beauv. Couch-grass, Quitch-grass. M. p. 153. 

 Fields and waste places. Summer. 



65. HOEDEUM L. 



Flowering scales, exclusive of awn, 6-8 mm. long. 



Awn of the flowering scale 1.25 cm. long or less. 1. H. nodosum. 



Awn of the flowering scale 2.5 cm. long or more. 2. H. jubatum. 



Flowering scales, exclusive of awn, about 1.2 cm. long. 3. H. murinum. 



1. HoRDEUM NODOSUM L. Mcadoiv-Barley. M. p. 155. Meadows and waste 



places. Summer. 

 Buc'ks — Perkasie, in ditches (Fr.). . 

 Caxie May — Goshen Landing (He.). 



2. HoRDEUM JUBATUM L. Squirrel-tail Grass. M. p. 155. Dry soil. Sum- 



mer. 



Philadelphia— Commons, Mart. (B. C). Buds — Quakertown, Telford 

 (Fr.). Montgomery— Amhler (Fr.). Detowore— Tinicum, rare (VP.), 

 Chester— Y alley Forge (W. Tr.). Lancaster— West Grove (Ca.). 



Camden — Kaighn 's Point (Ja.). Atlantic — Hammonton (C), Atlantic 

 City (He.). Mercer— Trenton (C). 



New Castle Shores, Woodland Beach, Commons. 



3. HORDEUM MURINUM L. Wall-Barley. M. p. 155. Ballast and waste 



places. Summer. 

 Philadelphia — Fairmount Park (Ja.). 

 Camden— l^aighn's Point (He.). 



66. ELYMUS L. Lyme-grass, Wild Eye. 



Empty scales narrowly awl-shaped; spike slender. 1. E. striatus. 



Empty scales linear-lanceolate to linear; spike stout. 



Flowering scales glabrous. 2. E. Virginicm. 



Flowering scales more or less appressed-pubescent, usually densely so. 



3. E. Canadensis. 



1. Elymus STRIATUS Willd. M. p. 156. Eocky woods and banks. Summer. 



Philadelphia— 'Wissahiekon (VP.). Delatvare— Mar-pie, Dr. Geo. Smith 

 (Fu.), Valley of Darby Creek (B. Sm.), Concord (W. Tr.). Chester— 

 (P.). Lancaster— (P.). Northampton— 'Easton, Porter (B.C.). 



Cape l/ai/— Wildwood (He.). Hunterdon— 'Rosemon.t, Eidge Island 

 (C). 



New Casiie— Mount Cuba, Greenbank, Brandywine, Commons. 



2. Elymus Virginicus L. M. p. 156. Along streams. Summer. 



3. Elymus Canadensis L. M. p. 157. Eiver banks. Summer. 



67. HYSTEIX (L.) Millsp. 



]. Hystrix Hystrix (L.) Millsp. Bottle-brush Grass. M. p. 158. Eocky 



woods. Summer. 



Philadelphia— Schuylkill, near junction of Wissahiekon (He.). Bucks 



— Sellersville (Fr.). Montgomery— Ahoxe Lafayette (VP.), Skippach 



Creek, Sumneytown (VP.). Delaivare—Wawa, (Ke.), Lansdowne (Pe.), 



