66 SELECTED WESTERN FLORA 



wrinkled ; flowers white, solitary, dioecious ; fruit red or yellowish, separating 

 from the dry receptacle. In great bog at Porcupine Mts. and similar loca- 

 tions, but not common south of Lat. 53°. 



3. R. triflorus, Richards. Dwarf Raspbeket. 



Stem ascending and short, or trailing and longer, unarmed, herbaceous 

 above and woody towards the base; leaves 3 or rarely 5-foliate, leaflets 

 rhombic-ovate and sharply serrate or double-serrate; flowers white, the 

 5-7 petals erect and longer than the reflexed sepals; peduncles 1-3-flowered; 

 fruit red, not separating from the receptacle. Wet woods, common, extend- 

 ing far northward. 



4. R. &Tcticus, L. Arctic. Raspberry. 



Stems somewhat erect, 3-10 in. high, unarmed; leaves 3-foliate, leaflets 

 often sessile, obqvate, coarsely and unevenly serrate, or sometimes slightly 

 lobed; flowers large, pink, or rarely white, terminal and usually solitary; 

 fruit red, not separating easily from the receptacle. In cold peat bogs in the 

 spruce woods along the northern borders of the prairies. 



9. AGRIMONIA. Agrimony. 



Calyx 5-eleft, tube somewhat hemispherical, the throat armed 

 with hooked bristles and enclosing the two achenes; petals 5, yel- 

 low; stamens 5-15. Perennial herbs with pinnate leaves, and 

 hmall flowers in a spike-Uke raceme. 



1. A. stri&ta, Michz. 



Stem erect, 1-2 ft. high, usually simple below the flowering braiiohes, 

 softly pubescent with appressed hairs; leaflets somewhat ribbed and nar- 

 rowing to a point; calyx turned abruptly outward in fruit. Damp ground 

 about thickets, extending westward almost to Rocky Mts. 



10. ROSA. Rose. 



Calyx tube cup-shaped, drawn in at the throat and becoming 

 fleshy in fruit; petals and stamens inserted on the edge of a disk 

 lining the calyx tube; ovaries becoming bony achenes attached to 

 the hoUow receptacle inside the calyx tube. Prickly shrubs with 

 large showy flowers. 



1. R. blanda. Ait. 



Stems 1-5 ft. high, slightly prickly or naked ; stipules dilated, sometimes 

 glandular-toothed; leaflets 5-7, oblong-lanceolate; flowers large, white or 

 pink, solitary or in corymbs. Eastern Man. 



