170 ROSACEAE 



nia : IVIonroe ; Northampton ; Bucks : Philadelphia ; Delaware ; 

 Chester ; Lancaster ; Huntingdon ; Erie ; Allegheny. 



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

 /• ^935^^-) III poor soil, N. Eng. to Pa. — Pennsylvania : Northampton ; 

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

 lin ; Allegheny. 



3. Potentilla Monspeliensis L. Rough Cinquefoil. (Man. p. 504; 

 I. F. f. 1922.) In dry soil, L,ab. to Alaska, S. C. and Kans. and in the 

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

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

 lin ; Huntingdon ; Erie ; Allegheny. 



4. Potentilla sulphurea Lam. Rough-FruiTED CinquEFOil. (Man. 

 p. 504; I. F. y. 1917.) In waste places, N. Y., Mich, and Va. Adv. 

 from Eu. — Pennsylvania : Allegheny. 



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

 p. 503; I. F. /. 1914.) In dry soil, N. S. and Ont. to N. Dak., D. C, 

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



6. Potentilla paradoxa Nutt. Bushy Cinquefoil. (Man. p. 505; 

 I.F. /. 1925.) Shores of the Great Lakes, ^a. to Minn., Mo., N. Mex. 

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

 Isle. 



16. •WALDSTEINIA Willd. 



1. 'Waldsteiniafragarioides (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 ;Schi\-lkill; 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. I'ernutn. 

 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. Virginianutn. 



Corolla j-ellow or cream-j'ellow. 

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



5. G.flaintm. 

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



6. G. stricttim. 



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

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

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

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



