ROSACEA. 69 



■•- 1- Style arising from the aide of the carpel. 



14. P. frutieo'sa, L. (Shrubby C.) Stem erect, g/srtiiAj/, 

 1-3 feet high, much branched. Leaves pinnate, of 5-7 leaf- 

 lets, closely crowded, entire, silky, especially beneath. 

 Flowers numerous, large, yellow, terminating the branches. 

 — Bogs. 



15. P. tpldenta'ta. Ait., (Thrbe-toothed C.) is common 

 eastward towards the sea-coast. Stem 4-^6 inches high. 

 Leaves rigid, palmate, of 3 wedge-shaped leaflets, 3-toothed 

 at the apex. Petals white, 



16. P. palustris, Scop. (Mabsh Five - fingek.) Stem 

 ascending. Leaves pinnate, of 5-7 lanceolate, crowded, 

 deeply serrate leaflets, whitish beneath. Calyx an inch 

 broad, dark purple inside. Petals purple. — Bogs. 



* * * Styles filiform, lateral. Peduncles axillary, solitary, 1-flowered. 



17. P. Anseri'na, L. (Silver -weed.) a low plant, 

 creeping with slender runners. Leaves all radical, interrupt- 

 edly pinnate ; leaflets 9-19, serrate, green above, silvery-silky 

 beneath. Flowers solitary, on long scape-like peduncles, bright 

 yellow. — Kiver and lake margins. 



18. P. Canaden'sis, L. (Canada C.) Stem prostrate or 

 ascending, silky-hairy. Leaves palmate, of 5 leaflets, the 

 latter serrate towards the apex. Flowers solitary. Petals 

 yellow, larger than the sepals. — Dry soil. 



10. CHAJHX'KHODOS, Bunge. 

 C. erecta, Bunge. Stem slender, 2-12 inches high, 

 branching above. Eadioal leaves many-cleft, forming a 

 rosette; cauline ones 3-5-cleft. — N.W. prairies. 



11. FRAGA'BIA, Tourn. Steawbeery. 



1. F. Virginia' na, Ehrhart. Achenes deeply imbedded in 

 pits on the surface of the fleshy receptacle ; calyx erect 

 after flowering. Leaflets firm. 



2. F. Ves'ea, L. Achenes not sunk in pits, but merely on 

 the surface of the receptacle; calyx spreading. Leaflets 

 thin. 



