Order 47.— ROSEWORTS. 201 



10. POTENTIL'LA. Cinquefoil. 



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

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

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

 and (mostly) yellow flowers. (Figs. 70, 77.) 



* Leaves pahnatelj 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., o-toothedat end. N. 

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

 3 P. min'ima. T'my 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-gras$. Stemlcss herbs. Leaves and peduncles radical. 



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



11. FRAGA'PJA. 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. 2G5, 455, 456.) 



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

 scapes. Root-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, t (272.) 



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



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

 Carpels distinct, 3-12, forming little 1 -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^ ^i(g- 



* 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 



9* 



