22 GRAMINEAE 



30. Panicum commutatum Schultes. Variable Panicum. (Man. 

 p. 88; I. F./. 253.) In dry woods and thickets, N. Y. to Ky., Fla. and 

 Te^.— Pennsylvania : Northampton ; Lancaster; Franklin ; Bucks ; 



DELAWARE. 



31. Panicum Ashei G. Pearson. AsHE's Panicum. (Man. p. 88.) 

 In dry woods, N. Y. to Tenn. and Ga. ; also in Mo. — Pennsylvania : Lan- 

 caster. 



32. Panicum maorooarpon LeCohte. Large-pruited Panicum. 

 (Man. p. 88; I. F. /. 236.) Moist places, Vt. to N. Y., N. J. and Pa. 

 — Pennsylvania : Monroe ; Northampton ; Bucks, Rockhill ; Pike ; 

 Delaware. 



33. Panicum Porterianum Nash. PORTER'S Panicum. (Man. p. 88 ; 

 I. F./ 254-) In woods. Me. to Minn., south to Fla. and Tex. — Pennsyl- 

 vania : Lancaster ; Bucks ; Bedeord ; Carbon ; Huntingdon ; Dela- 

 ware ; Chester ; Luzerne ; Montgomery ; Fulton ; Philadelphia ; 

 Franklin ; Monroe ; Lackawanna. 



34. Panicum pubifolium Nash. Hairy-lEaved Panic grass. (Man. 

 p. 1041.) In rocky woods, N. Y. to Mo., Fla. and Minn. — Pennsylvania : 

 Northampton ; Bucks ; Carbon ; Lancaster ; Franklin. 



35. Panicum clandestinum L. Hispid Panicum. (Man. p. 88 ; I. F. 

 f. 2S7- ) In thickets, Quebec to Mich., south to Ga. and Tex. — Pennsyl- 

 vania : Delaware ; CHESTER ; Bucks ; Philadelphia ; Northamp- 

 ton ; Lancaster ; Franklin ; Hxtntingdon ; Venango ; Montgom- 

 ery ; Pike. 



36. Panicum decoloratum Nash. Discolored Panic- GRASS. — Penn- 

 sylvania : Bucks, Tullytown. 



11. CHAETOCHLOA. 



Inflorescence with the spikelets racemosely arranged : bristles 5-16 at the base 



of each spikelet, involucrate. i. C. glauca. 



Inflorescence with the spikelets in clusters or on branches : bristles 1-3 at the 

 base of each spikelet, not involucrate. 

 Bristles downwardly barbed. .1.. C. verticillata. 



Bristles upwardly barbed. 

 Panicle usually i cm. thick or less : bristles commonly green : spikelets 



about 2 mm. long. 3. C. viridis. 



Panicle usually 2-3 cm. thick : bristles usually purple : spikelets 2.5-3 ™™- 



long. 4. C. Italica. 



1. Chaetochloa glauca (L.) Scribn. YELLOW Foxtail. Pigeon- 

 grass. (Man. p. 89; I. F. /. 281.) In waste places and cultivated 

 grounds throughout N. Am., except the extreme north. Naturalized 

 from Europe. — Pennsylvania : Delaware ; CHESTER ; Philadelphia ; 

 Bucks ; Northampton ; Lancaster ; Huntingdon ; Erie ; Franklin. 



2. Chaetochloa verticiUata (L.) Scribn. FoxTail-GRASS. (Man. p. 

 89; I. F. /. 280.) In waste places, N. S. and Ont. to N. J. and Ky.— 

 Pennsylvania : Northampton ; Bucks ; Lancaster ; Philadelphia ; 

 Chester; Allegheny. 



