208 THE FLORA. 



10. POTENTIL'LA. Cinquefoil. 



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

 outside. Petals 45, obcordate. Stamens QO . Acbenia oo , collected in 

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

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



* Leaves palinately compound. .. a 



* Leaves pinnately compound.. ..6-8 

 Leaflets 3 only in each leaf. ... 1 



a Leaflets 5. Stems prostrabe or inclining 4, 5 



1 Flowers yellow. Stems herbaceous 2, 3 



1 P. tridenta'ta. Trident 0. Fls. white. Lfts. wedge-obov., 3-toothed at end. N. 

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

 8 P. min'ima. Tiny C. Low. Steins 1 -flowered. Pet. longer than sepals. Mtt> 



4 P. Canaden'sis. Canada 0. Leaflets green both sides, serrate, oblong. 



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



6 P. frutico'sa. Shrubby 0. Erect, shrubs with yellow flowers, -ti'ight l-2f. M. 



7 P. Anseri'na. Goose-grasf. Sternless herbs. Leaves and peduucles radical. 



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



11. FRAGA'EIA. Strawberry. 



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

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

 surface of the large, conical, pulpy, scarlet or \vliite receptacle. Low it 

 plants with trifoliate leaves. (Figs. 265, 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 (27'J.) 



12. SPIR^E'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 wTth alternate leaves 

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



* Shrubs 4-9 f. high a 



* Herbs with the leaves once rr thrice pinnate 7 



e Stipules present 1, 2 



a Stipules none. Leaven simple and undivided . . . .b 



