DICOTYLEDONS. 103 



V. FRAGARIA. 



Perennial herbs ; aeaulescent, producing new plants at the 

 ends of long runners ; leaves trifoliate, long-petioled ; flowers 

 in long-peduncled cymes ; calyx 5-bracted, persistent, 5-parted; 

 petals 5 ; stamens many ; pistils many, forming achenes 

 which are inserted on a fleshy receptacle. 



1. F. ViRGiNiANA, Ducliesne. AVild Strawberry. Leaflets 

 thick, oval to obovate, coarsely serrate, somewhat hairy ; scape 

 usually shorter than the petioles, few-flowered ; fruit ovoid, achenes 

 imbedded in deep pits. j\Larch-May. Common. 



2. F. VESCA L. European Strawberry. Leaflets ovate or 

 broadly oval, dentate above, cuneate below, slightly hairy ; scape 

 usually longer than the petioles; fruit globular or oval, achenes 

 adherent to the nearly even surface of the receptacle. March-May. 

 Common in cultivation. INIany of the cultivated varieties of straw- 

 berry are hybrids between the two described above, 



VL DUCHESNEA. 



Perennial herbs ; aeaulescent, spreading and multiplying 

 by leafy runners ; leaves trifoliate ; flowers axillary, long- 

 peduncled ; calyx 5-bracted, 5-parted ; petals 5 ; stamens 

 numerous ; pistils numerous ; achenes numerous on an en- 

 larged receptacle. 



D. Tndica (Andr.) Focke. Strawberry Geranium. Leaflets 

 oval or round-obovate, crenate, obtuse at the apex ; peduncles 1- 

 flowered ; petals yellow ; fruit insipid. April-June. In waste places, 

 escaped from cultivation. 



Vn. POTENTILLA. 



Herbs or shrubs; leaves palmately or pinnately compound; 

 flowers perfect, solitary or (^ymose ; calyx persistent, 5- 

 bracted, 5-cleft ; i)etals 5, obcordate ; stamens numerous ; 

 carpels numerous, inserted on a dry, pubescent receptacle, 

 style terminal or lateral, deciduous. 



!*. Canadensis L. Cixquekoil. Perennial herbs; stem sim- 

 pk', trailing or ascending, 2-:J ft. long; leaves palmately S-foliate ; 



