28 GRAMINEAE 



Terr,, N. C. and Tex. — Pennsylvania: Chester; Bucks; Luzerne ; 

 Northampton ; Lancaster ; Huntingdon ; Blair ; Delaware ; 

 Franklin. 



2. Cinna latifolia (Trev.) Griseb. Slender Wood Reed-grass. 

 (Man. p. io8 ; I. F./.j6/.) In damp woods, Newf. to B. C, N. J., in 

 the Alleghenies to N. C, to Wis., and the Rocky Mts. to Colo, and Utah. 

 — Penftsylvania : Monroe ; Lackawanna ; Huntingdon ; Blair ; 

 Erie ; Pike. 



29. AGROSTIS L. 

 Palet of the spikelet conspicuous, at least .'/a as long as the scale. 



1. A. alba. 

 Palet inconspicuous, minute, or wanting. 



Flowering scale awnless, or very rarely bearing a short awn. 

 Stems weak, usually decumbent and often prostrate at the base : leaf-blades 

 lax : panicle oblong, the spikelets about 1.5 mm. long. 



2. A. perennans. 

 Stems, and usually also the leaf-blades, erect. 



Branches of the panicle capillary, elongated, commonly dividing above 

 the middle. 

 Spikelets 1.5-2 mm. long: leaf-blades short. 3. A. hyemalis. 



Spikelets 2.5-3 mm. long: leaf-blades elongated. 4. A. altissima. 

 Branches of the panicle not elongated, dividing at or below the middle. 



5. A. Scribneriana. 

 Flowering scale awned. 6. A. canhia. 



1. Agrostis alba L. Red-Top. Herd-grass. (Man. p. 109; L F. 

 f. 362.) In fields nearly throughout N. Am. Nat. from Eu. — Pennsylva- 

 nia : Delaware ; Chester ; Bucks ; Luzerne ; Northampton ; Mon- 

 roe ; Lycoming; Huntingdon; Erie; Allegheny ; Montgomery ^ 

 Lancaster; Philadelphia; Pike; Franklin. Common. 



2. Agrostis perennans (Walt.) Tuckerni. Thin-gr.\ss. (Man. p. 

 no; I. V.f.^Gj.) In shaded damp places, Quebec to Wis., S. C. and 

 Tenn. — Pennsylvania : Delaware ; Philadelphia ; Chester ; 

 Bucks ; Luzerne ; Northampton ; Lancaster ; Franklin ; Dau- 

 phin ; Centre ; Huntingdon ; Jefferson ; Erie ; Somerset. 



3. Agrostis hyemalis (Walt.) B.S.P. Rough Hair-gra.ss. (Man. 

 p. no; I. F. y. j68.) In dry or moist soil throughout nearly the whole 

 of N. Am. except the extreme north. — Pennsylvania: Delaware; 

 Chester ; Bucks ; Luzerne ; Northampton ; Monroe ; Lancaster ; 

 Franklin ; Erie ; Jefferson ; Lackawanna ; Schuylkill. 



4. Agrostis altissima (Walt.) Tuckerm. Tall BEnt-geass. (Man. 

 p. Ill ; I. F.y. j(5p. ) In sandy swamps, N. J. to Fla. and Ala. — Pennsyl- 

 vania : Montgomery. 



5. Agrostis Scribneriana Nash. Scribner's Bent-grass. (Man. 

 p. Ill ; I. F. y. j/O, as ^. intermedia.) In dry soil, Mass. to N. Y., 

 Tenn. and Mo. — Pennsylvania : Northampton ; Lancaster. 



6. Agrostis canina L. Brown Bent-grass. (Man. p. no; I. V.f. 

 365.) In meadows, Newfoundland to Alaska, Pa. and Tenn. — Pennsyl- 

 vania : Northampton ; Dauphin ; Blair. 



