ROSACEA 65 



6. FRAGARIA. Strawberry. 



Flowers very much as in PotentiUa, 

 but often dioecious ; receptacle much en- 

 larged in fruit, bearing the achenes scat- 

 tered over its surface. Stemless perennial 

 herbs with 3-foliate leaves, white flowers, 

 and slender runners. 



1. F. virgini&na, Duchesne. 



Leaflets not deeply toothed; flowers ar- 

 ranged in a rather flat cyme ; achenes sunken in 

 pits on the surface of the enlarged receptacle. ^^°- 48. — Fragaria vifgini- 

 Moist rich ground, common, Man.-Alta. ^°^' 



7. CHAM^'RHODUS. 



Calyx 5-cleft, without bracts; petals 5, about as long as the calyx 

 lobes, white or purplish; stamens 5, opposite the petals; carpels 

 5-20; styles lateral. Erect pubescent herbs with 3-foliate leaves, 

 the leaflets usually cut into linea? segments. 



1. C. erecta, (L.) Bunge. 



Erect, 1-3 ft. high, glandular-pubescent; root woody; flowers small, 

 crowded in cymes. Light gravelly soil, Sask. and Alta. 



8. RtJBUS. Bramble. 



Calyx deeply 5-parted, without bracts, persistent, the tube short 

 and broad; petals 5, deciduous; stamens numerous, on the calyx, 

 distinct; styles nearly terminal; carpels numerous, collected on a 

 convex or elongated, more or less succulent receptacle, and ripening 

 into small drupes forming an aggregate fruit. Perennial herbs, 

 shrubs, or vines with alternate stipulate leaves, and frequently 

 armed with prickles. 



1. R. idaeus, L. (var. aculeatissimus, C. A. Mey.) Red Raspbbbry. 



Stems upright, shrubby, 2-5 ft. high, usually covered with weak glandular 

 prickles (or on the older stems hooked pric^kles) ; leaves 3-foliate, the leaflets 

 ovate and sharply serrate; flowers white, the petals as long as the sepals; 

 calyx hairy; fruit red, separating freely from the elongated receptacle. 

 Common in newly burned woods, Maij.T-Alta. i', . , 



2. R. ChamsemoruSi.L. Cloud Berry. ■ i ' , 



Herbaceous, creeping as a rootstock, sending up branches 3-10 in. high, 

 often finely pubescent; leaves simple, orbicular, somewhat 5-lobed, serrate, 

 F 



