208 THE FLORA. 



10. POTEITTIL'LA. Cinquefoil. 



Calyx deeply 4-5-cleft, with an equal number of alternate bractlets 

 outside. Petals 4^5, obcordate. Stamens oo . Achenia oo , collected in 

 a head on a small, dry receptacle. — Herbs or shrubs with compound leaves 

 and (mostly) yellow flowers. (Figs. 76, 77.) 



* Leaves palmately compound a 



* Leaves pinnately compound 6-8 



a Leaflets 3 only in each leaf 1 ^ 



a Leaflets 5. Stems prostrate or inclining 4, 5 



1 Flowers yellow. Stems herbaceous 2, 3 



1 P. tridenta'ta. Trident C. Fls. white. Lfts. wedge-obov., 3-toothedat end. N. 



2 P. Norve'gica. Norway C. Erect, many-flowered. Petals short. N. M. 



3 P. min'ima. Tiny G. Low. Stems 1-flowered. Pet. longer than sepals. Mts 



4 P. Canaden'sis. Canada C. Leaflets green both sides, serrate, oblong. 



5 P. argen^tea. Silver G. Leaflets silvery-white beneath, pinnatifid. 



6 P. frutico'sa. Shrubby G. Erect, shrubs with yellow flowers. Height l-2f. N. 



7 P. Anseri''na. Goose-ffrass. Steraless herbs. Leaves and peduncles radical. 



8 Herbs with leafy stems. (3 rare species omitted.) 



11. FRAGA'RIA. Strawberry. 



Calyx deeply 5-cleft, with an equal number of alternate bractlets out- 

 side. Petals 5, obcordate. Stamens oo . Achenia many, fixed to the 

 surface of the large, conical, pulpy, scarlet or white receptacle. — Low U 

 plants with trifoliate leaves. (Figs. 265, 455, 456.) 



1 F. Virginia'na. Gommon S. Bractlets under the calyx entire. Flowers white, on 

 scapes. Koot-stock sending out runners which take root and form new plants. 



2 F. In'dica. Indian Strawberry. Bractlets under the calyx 3-lobed. Petals yellow. 

 Stems trailing on the ground. Fruit roundish, bright red, tasteless. S. f (272.) 



12. SPIR^'A. Meadow-sweet. Hard-hack. 



Calyx 5-cleft, persistent. Petals 5, roundish. Stamens 10-50, exserted. 

 Carpels distinct, 3-12, forming little 1-celled, several-seeded pods. Styles 

 terminal. — U Beautiful, unarmed herbs or shrubs with alternate leavea 

 and branches, and small white or rose-colored flowers. May^ Aug. 



* Shrubs 4-9 f. high a 



* Herbs with the leaves once or thrice pinnate ... .7 

 a Stipules present 1, 2 



a Stipules none. Leaves simple and undivided , . . .b 



