170 ROSACEAE 



nia : Monroe ; Northampton ; Bucks : Philadei,phia ; Di;i,aware ; 

 Chester ; Lancaster ; Huntingdon ; Erie ; Allegheny. 



2. Potentilla pumila Poir. DwarE Five-Finger. (Man. p. 506; I. F. 

 y. igj^a.) In poor soil, N. Eng. to Pa. — Pennsylvania : Northampton ; 

 Bucks ; Philadelphia ; Delaware ; Chester ; Lancaster ; Frank- 

 lin ; Allegheny. . 



3. Potentilla Monapeliensls L. Rough Cinqueeoil. (Man. p. 504; 

 I. F. /. ig22.) In dry soil, Lab. to Alaska, S. C. and Kans. and in the 

 Rocky Mts. to Ariz. — Pennsylvania : Monroe ; Northampton ; Bucks ; 

 Philadelphia ; Delaware ; Chester ; Lancaster ; Carbon ; Frank- 

 lin ; Huntingdon ; Erie ; Allegheny. 



4. Potentilla sulphnrea Lam. Rough-Eruited Cinqueeoil. (Man. 

 p. 504 ; I. F. /. jgij. ) In waste places, N. Y., Mich, and Va. Adv. 

 from Eu. — Pennsylvania : Allegheny. 



5. Potentilla argentea L. Silvery or Hoary Cinqueeoil. (Man. 

 p. 503; I. F. /. /gi4.) In dry soil, N. S. and Ont. to N. Dak., D. C, 

 Ind. and Kans. — Pennsylvania : Monroe ; Northampton. 



6. Potentilla paradoza Nutt. Bushy Cinqueeoil. (Man. p. 505; 

 I.E./. 1925.) Shores of the Great Lakes, Pa. to Minn., Mo., N. Mex. 

 and Ore. Also in Mex. and Mautchuria. — Pennsylvania : Erie, Presque 

 Isle. 



16. WALDSTEINIA Willd. 



1. Waldsteinia fragarioides ( Michx. ) Tratt. Barren or Dry Straw- 

 berry. (Man. p. 506; I. F. /. 1939.) Woods and shaded hillsides, 

 northern N. Eng. and Ont. to Minn., Ind. and along the Alleghenies to 

 Ga. — Pennsylvania : Monroe ; Northampton ; Schuylkill ; Lebanon; 

 Perry ; Franklin ; Tioga ; Centre ; Erie ; Somerset ; Allegheny. 



17. GEUM L. 



Style plumose below : sepals erect or spreading : corolla purple. 



1. G. rivale. 

 Style not plumose : sepals reflexed : corolla white or yellow. 



Head of fruit .stalked : sepals not accompanied by bractlets. 



2. G. vernum. 

 Head of fruit sessile ; sepals accompanied by bractlets. 



Corolla white. 

 Plant glabrate or softly pubescent : receptacle bristly. 



3. G. Canadense. 

 Plant hirsute : receptacle glabrous or downy. 4. G. Virginianum. 



Corolla yellow or cream-yellow. 

 Petals oblong, 3-4 mm. long : sepals about as long as the petals. 



5. G.flavum. 

 Petals obovate, 6-8 mm. long : sepals much shorter than the petals. 



6. G. strictum, 



1. Oeum rivale L. Purple or Water Avens. (Man. p. 508 ; I. F. 

 J. 1940.) In swamps and low grounds, Newf. to B. C, N.J., Pa., Mo. 

 and Colo. Also in northern En. and Asia. — Pennsylvania : Wayne ; 

 Monroe ; Tioga ; Sullivan ; Erie ; Somerset ; Chester. 



