ROSACEAE (ROSE FAMILY) 



2 a Achenes of fruit imbedded in pits on the receptacle ; 

 flowering stalk usually shorter than the leaves; plant 

 growing in fields and waste places 



WILD STRAWBERRY. (F. virgini&na.) 



b Achenes of fruit not imbedded in pits on the receptacle; 

 flowering stem usually longer than the leaves; plant 

 growing in woods WOOD STRAWBERRY. (F. vesca.) 



13 DUCHfiSNEA INDIAN STRAWBERRY. (D. indica.) 



14 C6MARUM PURPLE CINQUEFOIL. (C. palustre.) 



15 ARGENTINA SILVER-WEED. (A. anserlna.) 



1 6 POTENTILLA. 



1 a Leaves 3-foliolate; plant erect 



ROUGH CINQUEFOIL. (P. monspeliensis.) 

 b Leaflets usually 5-9, rarely 3 ; plants prostrate or erect. . 2 



2 a Plant erect; leaflets 5-9; flowers sulphur-yellow 



ROUGH-FRUITED CINQUEFOIL. (P. sulphiirea.) 

 b Plants not erect; leaflets 5, rarely 3 3 



3 a Flowers in cymes; leaflets with silvery hairs beneath 



SILVERY CINQUEFOIL. (P. argentea.) 

 b Flowers solitary in the axils of the leaves 4 



4 a Plant 6-20 in. long; first flower from axil of second to 



fourth stem leaf FIVE-FINGER. (P. canadensis.) 



b Plant 3-10 in. long; first flower from axil of first 



stem leaf DWARF FIVE-FINGER. (P. pitmila.) 



17 WALDSTEiNIA BARREN STRAWBERRY. (W. fragarioides.) 



18 GfcUM. 



1 a Flowers red; cultivated species 



GARDEN AVENS. (G. chiloense*) 

 b Flowers not red ; wild species 2 



2 a Flowers purple, %-i in. broad. . PURPLE AVENS. (G. rivale.) 

 b Flowers not purple 3 



3 a Flowers cream-yellow, about a /4 in. broad; stipules 



Vz-i in. long, toothed . CREAM-COLORED AVENS. (G.flavum.) 

 b Plants not completely as in a 4 



4 a Flowers white 5 



b Flowers yellow 6 



5 a Stems covered with bristly hairs; receptacle not hairy 



ROUGH AVENS. (G. virginianum.) 

 b Stems not covered with bristly hairs; receptacle hairy 



WHITE AVENS. (G. canadtnse.) 



6 a Calyx not subtended by bracts ; head of fruit stalked 



above the calyx SPRING AVENS. (G. vtrnum.) 



b Calyx subtended by bracts; head of fruit not stalked 



above the calyx YELLOW AVENS. (G. strictum.) 



165 



