64 The Vegetation of the 



Poa sylvestris Gr. woods III. 5 Micb..— Ky.— Up.Miss. 



Poa serotina Ehrh. banks II. 4 N.E.—B.Mts.— Or.— Alaska. 



Poa pratensis L. prairies, cultivated ground V. 10 N.E.— Up.Mc— 72° N.L. 



Kotzebue Sund — Greenland. 

 Poa compressa L. dry soil V. 8 N.E.— Up.Miss.— 54° N.L. 

 Poa annua L. dry prairie, cultivated land V. 4 Atl. — Pacif . 

 Eragrostis reptans Nees low sandy banks V. 10 Atl.— Up.Miss. 

 Eragrostis Erankii Mey. sandy banks V. 8 Oh.— Up.Miss. 

 Eragrostis capillaris Nees sandy soil, fields V. 8 Atl. — Miss. 

 Eragrostis pectinacca Gr. var. spectabilis sandy soil V. 7. Mass. — Oh. — Fla, 



—Miss. 

 Festuca tenella Willd. dry prairie V. 6. N.E — Up.Mo. Fla.- Cal. 

 Festuca nutans Willd. woods V. 5 N.E.— Fla.— Up.Mo. 

 Bromus Kalmii Gr. woods IV. 4 N.E. — Cal. — Arct. 

 Bromus ciliatus L. woods IV. 4 Atl.— Pacif. G.— Arct. 

 Phragmites communis Trin. banks, swamps II. 6 Atl.— Pacif . G.— 54°N.L. 

 Hordeum pratense Huds. roadsides IV. 5 Oh. — La.— E.Mts. 

 *Hordeum jubatum L. fields 1. 3 W.Can.— Up.Miss.— E.Mts.— Cal. 

 Elymus virgimcus L. woods IV. 4 Atl.— Up.Mo. G. — Can. 

 Elymus canadensis L. prairie, copses III. 5 N.E.— Up.Mo. 

 Elymus strictus Willd. var. villosus woods V. 4 N.E.— AH.— Cal. 

 Gymnostichum Hystrix Schreb. woods V. 3 N.E.— All. (Ga.)— Up.Miss. 

 Danthonia spicata Beauv. dry open woods III. 6 Atl.— Miss. 

 Phalaris arundinacea L. swamps II. 6 JS.E.— Up.Miss. — Cal.— 60°N.L. 

 Panicum anceps Michx. moist places V. 5 N.J.— Up.Miss.'Fla.— La. 

 Panicum prolif erum Lam. roadsides, moist places V. 6 Atl.— Miss. 

 Panicum capillare L. sandy soil V. 7 Atl.— Cal. G.— Can. 

 Panicum autumnale Bosc. sandy prairie I. 5 S.Ca. — 111. 

 Panicum virgatum L. banks, bottom V. 4 N.E.— Up.Mo. Fla.— N.Mex. 

 Panicum clandestinum L. copses II. 4 N.E. — N.Ca.— Up.Mo. 

 Panicum latifolium L. copses V. 4 N.E.— Up.Miss. Fla.— N.Mex. 

 Panicum scoparium Lam. prairie III. 4 N.W.— Ga.— Miss. 

 Panicum dichotomum L. open woods, prairie V. 7 N.E.— Cal. Fla.— W.Tex. 

 Panicum depauperatum Muhl. dry prairie, copses III. 5 N.E.— N.Ca.— 



Up.Miss. 

 Panicum crus Galli L. bottom, fields VII. 7 N.E.— Fla.— Tex.— Cal.— Or. 

 Cenchrus tribuloides L. bottom, cultivated land V. 5 N.E.— Fla.— Tex.— 



Cal.— Up.Mo. 



Andropogon furcatus Muhl. prairie V. 5 N.E.— Up.Mo. Fla. N.Mex. 



Audropogon scoparius Michx. sandy soil V. 7 JST.E.- Up.Mo. Fla.— N.Mex. 

 Chrysopogon nutans Benth. dry prairie V. 6 N.E.— Up.Mo. Fla.— N.Mex. 



Equisetacese. In N. Am. 1 Gen. 13 Spec. 



Equisetum arvense L. sandy soil, banks VI. 3 N.E.—N.Mex.— Cal.— Arct. 

 tEquisetum palustre L. bottom I. 5 N.Y.— Up.Miss. 



Equisetum limosum L. shallow waters VI. 4 N.E.— Up.Miss. 



Equisetum laevigatum A. Br. dry clay soil I. 3 N.Ca.— 111.— Cal. 



Equisetum hiemale L. banks VI. 5 N.E.— N.Mex.— Cal. 



Equisetum robustum A. Br. banks V. 6 Oh.— N.Mex.— Or. 



Equisetum variegatum Schleich. banks II. 3 N.E.— E.Mts.— 72°N.L. 

 Filices. In N. Am. 30 Gen. 146 Spec. 



Adiantum pedatum L. woods VIII. 8 N.E.—N.Ca.— Cal.— Alaska. 



*Hordeum jubatum is observed only since five years. When not overlooked before as it ir 

 . not common, then it may be that it recently immigrated from the Northwest. ueiort, as ii is 



