16 GRAMINEAE 



DELPHiA ; Bucks ; Lancaster ; Dauphin ; Lebanon ; Centre ; Blair ; 

 Erie ; York ; Allegheny. 



3. ADdropogon Virginicus L. Virginia Beard-grass. (Man. p. 

 70 ; I. F. f. 220.) In fields or thickets, Mass. to 111., Fla. and Texas. — 

 Pennsylvania : Delaware ; Chester ; Philadelphia ; Lancaster ; 

 Luzerne. 



4. Andropogon corymbosus (Chapm.) Nash. Bushy Beard-grass. 

 (Man. p. 69; I. F. f. 221.) In damp soil or swamps, N. Y. and Pa. to 

 Fla. — Pennsylvania: Delaware; Chester; Lancaster; Bucks; 

 Montgomery. 



4. SORGHUM Pers. 



1. Sorghum Halepense ( L. ) Pers. Johnson- grass. (Man. p. 71 ; I- 

 F. f. 22^.) In waste places and fields, Pa. to Kans., Fla. to Tex. — 

 Pennsylvafiia : Philadelphia ; Bucks. 



5. SORGHASTRUM Nash. 



1. Sorghastrum avenaceum (Michx.) Nash. Indian Grass. (Man. 



p. 71 ; I. F. /. 22f.) In dry fields, Ont. to Man., R. I., Fla. and Ariz. — 



Pennsylvania : Delaware ; Chester ; Bucks ; Lancaster ; Luzerne ; 



Huntingdon ; Philadelphia ; York ; Dauphin ; Erie ; Allegheny. 



6. NAZIA Adans. 

 1. Nazia racemosa (L. ) Kuntze. Prickle GRASS. (Man. p. 72; I. 

 F. y. 226.) On or near ballast. — Pennsylvania : Philadelphia. 



7. PASPALUM L. 



Rachis dilated, its broad margins membranous and at maturity inrolled on the 



spikelets. i. P. membranaceum. 



Rachis winged or wingless, its margins neither membranous nor enclosing the 



spikelets. 



Plants with i-several raceme-bearing peduncles from the uppermost sheath. 



Peduncle long-hirsute below the raceme : basal leaf-sheaths glabrous or 



nearly so. 2. P. pubescens. 



Peduncles glabrous : basal leaf -sheaths generally hirsute. 



3. P. Muhlenbergii. 

 Plants with simple stems, no raceme-bearing peduncles from the upper sheath. 



4. P. laeve. 



1. Paspalum membranaceum Walt. WALTER'S Paspalum. (Man. 

 p. 73 ; I. V.f. 22S.) In wet or moist soil, N. J. to Ohio, Fla. and Tex. — 

 Pennsylvania : Philadelphia, on ballast and in waste places. 



2. Paspalum pubescens Muhl. Pubescent Paspalum. (Man. p. 

 74.) In fields, N. Y. to D. C. and Tenn. Pennsylvania : Montgomery, 

 Willow Grove. 



3. Paspalum Muhlenbergii Nash. Muhlenberg's Paspalum. 

 (Man. p. 75.) In sandy or stony ground. Mass to Mo., S. C, Miss, 

 and I. Terr. — Pennsylvafiia : Northampton ; Franklin ; Lancaster I 

 Bucks ; Philadelphia ; York ; Chester ; Delaware, Tinicum. 



4. Paspalum laeve Michx. Field Paspalum. (Man. p. 73 ; I. F. 

 /. 234..) In fields, R. I. to Ky. and Mo., south to Fla. and Tex. — Penn- 



