46 SELECTED WESTERN FLORA 



8. R. acris, L. Common Buttercup. 



Tall, erect, hairy; loaves deeply cleft; flowers large and bright yellow. 

 Introduced, but fairly common along the railways. 



9. R. abortrtus, L. Small-flowered Crowfoot. 



Biennial, slightly hairy ; root leaves round or 3-lobed, stem leaves 3-5- 

 parted; petals small, pale yellow, making the flower very inconspicuous. 

 Cool, moist woods, Man.-Alta. 



10. R. rhomboideus, Goldie. Dwarf Buttekcop. 



Low, hairy; root leaves entire, roundish, crenate; stem leaves 3-5-lobed, 

 the lobes becoming more deeply divided and the petioles shorter until the 

 upper leaves are 3-5-parted and sessile or nearly so. Common on prairfes, 

 April- June, Man.-Alta. 



11. R. Macdunii, Britton. 



Annual; stout, hairy, reclining; stems few-leaved; aehenes with a stout 

 beak. Moist places. Man. and westward. 



12. R. affinis, R. Brown. 



Stem 4-12 inches in height, pubescent or glabrous; leaves various but at 

 least the upper cut into linear lobes; flowers few-several; petals light yel- 

 low or wanting: aehenes short, woolly, with a short recurved style not 

 more than one third the length of the ovary and sometimes persisting as 

 a beak. Sask. and Alta. 



2. ACT.ffiA.' Banebekry. 



Sepals 4 or 5, falling off -when the flower opens, making it appear 

 to have only one set of floral envelopes ; petals 4-10, small; stamens 

 numerous ; inflorescence a naked raceme ; fruit a large and poisonous 

 berry. Erect perennial herbs with large compound leaves and 

 terminal racemes of small white flowers. 



1. A. riifira, (Ait.) Willd. Red Baneberry. 



Raceme ovoid; petals somewhat broadly spatulate; berries bright red. 

 Rich moist woods and occasionally in waste places near the woods, Man.-_ 

 Alta. 



2. A. 51ba, (L.) Mill. White Baneberry. 



Raceme more slender than in the preceding; petals slender, like modified 

 stamens; berries white on much thickened pedicels. Rich woods only, 

 Man.-Alta. 



3. THALfCTRUM. Meadow Rub. 



Apetalous; sepals 4 or 5, greenish. Perennial herbs with 2 or 

 3 ternately compound leaves, both the divisions and the leaflets 

 stalked. Flowers dioecious in our species. 



