DICOTYLEDONOUS PLANTS 113 
longer than the sepals. Fruit ovoid, black, smaller than the pre- 
ceding. Common in old fields.* 
8. R. hispidus, L. Stem trailing or prostrate, often several feet 
in length, armed with small, straight, or recurved prickles, and 
often thickly set with bristles. Leaves petioled, mostly of 3 leaflets ; 
leaflets obovate, obtuse, rather coarsely serrate. Flowering branches 
commonly erect, few-flowered, flowers white. Fruit black. Common 
on dry, sandy soil.* 
VI. WALDSTEINIA, Willd. 
Stemless perennial herbs. Leaves 3—5-lobed or divided. 
Flowers several, rather small, yellow, on a bracted scape. 
Calyx-tube top-shaped; the limb 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 STRAWBERRY. 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. FRAGARIA, Tourn. 
Perennial scape-bearing herbs, with runners. Leaves with 
3 leaflets ; stipules adnate to the petiole. Flowers (of Ameri- 
can species) white. Calyx free from the ovary, 5-parted, 
5-bracted, persistent. Petals 5. Stamens many. Carpels 
many, on a convex receptacle. Akenes of the ripe straw- 
berry many, very small, more or less imbedded in the large, 
sweet, pulpy receptacle. 
1. F. virginiana, Mill. Wiip Srrawserry. Leaflets thick, 
oval to obovate, coarsely serrate, somewhat hairy. Scape usually 
shorter than the petioles, few-flowered. Fruit ovoid, akenes imbedded 
in deep pits. Common.* 
2. F. vesca, L. EurRoPEAN STRAWBERRY. Leaflets ovate or 
broadly oval, dentate above, wedge-shaped below, slightly hairy. 
Scape usually longer than the petioles. Fruit globular or oval, 
akenes adherent to the nearly even surface of the receptacle. Com- 
mon in cultivation. Many of the cultivated varieties of strawberry 
are hybrids between the two described above. The American form 
is less hairy than the European and is by some regarded as distinct.* 
