70 THE ROYAL SOCIETY OF CANADA 



Anemone, is a beautiful member of the Ranunculaceae which occurs 

 in abundance on dry soil, from the eastern margin of the prairie 

 region through the Rocky Mountains to the Coast Range, extending 

 to Alaska and beyond the Arctic Circle. It is a perennial with a thick 

 taproot, and leaf-blades repeatedly dissected into linear divisions, which 

 are hairy, at least when young. The large, solitary flowers are purple 

 or violet, seldom white, with sessile involucral leaves. The achenes are 

 silky with plumose, persistent styles about 3 cm. long. According 

 to Rydberg, the blossoms appear from March to the summer. 



7. Potentilla bipinnatiflda, Dougl. (Rosaceae). This perennial 

 cinquefoil or five-finger occurs on plains and hills from Manitoba to 

 Alberta and as far south as Colorado, in July and August. Its erect 

 stems, about 1 ft. in height, and pinnate leaves are covered with fine 

 white hairs. The styles of the yellow flowers are glandular and thick- 

 ened at the base. 



8. Cheirinia inconspicua, (S. Wats.) Rydb. (Cruciferae). The 

 prairie-rocket is a biennial with an angled stem from 3 to 6 dm. high. 

 The leaves are linear or oblanceolate, almost entire, and covered with 

 fine grayish hairs. The flowers are pale yellow, the pods erect from 

 1-5 to 5 cm. long and about 2 mm. thick, containing one row of seeds 

 in each locule. It occurs in dry soil from Minnesota to British Col- 

 umbia, blossoming in July and August. 



9. Solanum triflorum, Nutt. (Solanaceae) . A spreading 

 annual, about 2-9 dm. in length, with pinnatifid leaves, white flowers, 

 and globose green berries. This Solanum grows on the prairies and in 

 waste places from western Ontario to British Columbia and south to 

 New Mexico and Arizona. Macoun says that it is very common near 

 "badger" holes and along the railways throughout the prairie region, 

 and Mr. Stansfield found his specimens only near gopher holes. 



10. Achillea lanulosa, Nutt. (Compositae). The woolly yarrow 

 is a silky perennial about 1-23/^ ft. high, with deeply and finely lobed 

 leaves and with white flowers in convex clusters. It grows in dry 

 soils from Ontario to Saskatchewan and south to Mexico, flowering 

 from May to September. 



11. Artemisia frigida, Willd. (Compositae). The Pasture Sage- 

 brush or Wormwood Sage is a perennial with finely divided leaves, 

 covered with white hairs. The numerous small nodding heads of 

 yellow flowers are arranged in a raceme. It blossoms from July to 

 October, on dry plains and hills from Hudson Bay to Texas. The 

 Sage-brushes are characteristic features of sandy regions, especially 

 in successions following "blow-outs." 



