ROSE FAMILY 119 
2. F. vesca L. Evropean Strawsperry. Leaflets ovate or broadly 
oval, dentate above, wedge-shaped below, slightly hairy. Scape usu- 
ally longer than the petioles. Fruit globular or oval, akenes adherent 
to the nearly even surface of the receptacle. Common in cultivation. 
Many of the cultivated varieties of strawberry are hybrids between 
the two described above. The following variety is by some regarded 
as distinct.* 
Var. americana Porter. AMERICAN Woop Strawberry. Slender, 
smooth or silky-downy. Leaflets very thin, sharply cut-toothed, downy 
beneath with close-lying silvery hairs, the down of the scapes, the 
pedicels, and sometimes of the leafstalks also, usually close-lying. 
Calyx lobes reflexed in fruit. Rocky woods. 
VII. WALDSTEINIA Willd. 
Stemless perennial herbs. Leaves 5-5-lobed or -divided. 
Flowers several, rather small, yellow, on a bracted scape. 
Calyx tube top-shaped; the hmb spreading, with sometimes 
little bracts alternating with the lobes. Petals 5. Stamens 
many. Style 2-6. Akenes few, on a dry receptacle. 
1. W. fragarioides Tratt. BARREN StrRAwBeERRy. A low herb with 
much the appearance of a strawberry plant. Leaflets 3, broadly 
wedge-shaped, crenate-dentate. Scapes many-flowered; the flowers 
rather pretty. Wooded hillsides. 
IX. POTENTILLA L. 
Perennial herbs, rarely shrubs. Leaves compound; stipules 
united to the petiole. Flowers white or yellow, rarely red ; 
solitary or in cymes. Calyx hypogynous, 5-cleft, with 5 little 
bracts alternating with its lobes. Petals 5. Stamens many. 
Carpels usually many, on a dry convex or concave receptacle ; 
styles falling off from the akenes as they mature. 
B. Fl. species 5 (Argentina). 
1. P. arguta Pursh. Upricur Cinquerorn. An erect, stout, hairy 
plant, 1-4 ft. high. Basal leaves long-petioled, pinnate. Stem leaves 
few, each of 3-7 leaflets, the latter broadly ovate and cut-toothed or 
serrate, downy underneath. Flowers large, in dense terminal clus- 
ters; the petals whitish or cream color. Rocky hills. 
2. P. monspeliensis L. Rovucn CinquerorL. Annual or biennial. 
Stem rough-hairy, erect and stout, 6-30 in. high. Leaves of 3 leaf- 
lets, the lower petioled, the upper stem leaves sessile or nearly so, 
