118 KEY AND FLORA 



Calyx tube 5-cleft, its lobes epigynous. Petals oblong. Styles 

 5, united below ; ovary 5-celled, 2 ovules in each cell, often 

 only 1 maturing. Pruit small, berry-like.* 



1. A. canadensis Medic. Service Berry, Juneberry, Shad 

 Bush, Sugar Plum, Sugar Pear, Wild Pear. A small tree, 

 branches downy when young, soon becoming smooth. Leaves ovate 

 to elliptical, finely and sharply serrate, acute at the apes, usually 

 obtuse or cordate at the base. Racemes slender, many-flowered, 

 appearing before or with the leaves. Flowers showy. Petals 4 or 5 

 times the length of the smooth calyx lobes. Fruit globose, dark red, 

 edible. In rich woods. Extremely variable in height and in shape 

 of leaves.* 



2. A. spicata K. Koch. Round-Leaved Juneberry. jNIuch like 

 A. canrulensis, but with the leaves broadly oval, ovate, or almost 

 orbicular, and usually rounded at both ends. Woods and thickets, 

 especially K. 



VI. crat.s;gus l. 



Shrubs or small trees, mostly with numerous strong spines, 

 wood very hard. Leaves serrate, lobed or deeply incised, 

 petioled. Flowers white or pink, in terminal corymbs or 

 sometimes solitary. Calyx tube urn-shaped, 5-cleft, the limb 

 persistent. Petals round. Stamens few or many. Styles 1-5, 

 distinct ; ovules 1 in each cell. Fruit a small pome with bony 

 carpels.* [The species are hard to distinguish and are not 

 very perfectly defined. Probably more than 60 species occur 

 within the limits of this flora.] 



VII. FRAGARIA L. 



Perennial scape-bearing herbs, with runners. Leaves with 

 3 leaflets ; stipules united to the petiole. Flowers (of Ameri- 

 can species) white. Calyx hypogynous, 5-parted, 5-bracted, 

 persistent. Petals 6. Stamens many. Carpels many, on a 

 convex receptacle. Akenes of the ripe strawberry many, very 

 small, more or less imbedded in the large, sweet, pulpy 

 receptacle. 



1. F. virginiana Duchesne. Wild Strawberry. Leaflets thick, 

 oval to obovate, coarsely serrate, sompM'hat hairy. Scape usually 

 shorter than the petioles, few-flowered. Fruit ovoid, akenes imbedded 

 in deep pits. Common.* 



