Obdbk 47.— ROSEWORTS. 201 



10. POTENTIL'LA. CinquefoU. 



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

 outside. Petals 4r-5, oboordate. 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 iu each leaf 1 



a Leaflets 5. Stems prostrate or inclining. . . .4, 5 

 1 Flowers yellow. Stems herbaceous.... 2, 8 

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



2 P. Worve'gioa. 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. Oanaden'sis. Canada G. Leaflets green both sides, serrate, oblong. 



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



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



7 P. Anseri'na. Goose-grass. Stemless herbs. Leaves and peduncles radical. 



8 Herbs with leafy stems. (8 rare species ojjjitted.) 



11. FEAGA'EIA. Strawberry. 



Calyx d'eeply 5-cleft, with an equal number of alternate bractlets out- 

 side. Petals 5, oboordate. Stamens oo . Achenia maay, fixed to the 

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

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



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

 scapes. Eoot-stook sending out ri^nners which take root and form new plants. 



2 F. In'dlca. Indian Strawberry. Bractlets under the calyx 8-lobed. Petals yellow. 

 Stems trailing on the ground. Fruit roundish, bright red, tasteless. S. t (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 l-celled, several-seeded pods. Styles 

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

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



* Shrubs 4r-9f. high.... a 



"^ Herbs with the leaves once or thrice pinnate 7 



a Stipules present 1,2 



a Stipules none. Leaves simple and undivided b 



9*. 



