490 MINNESOTA BOTANICAL STUDIES. 



lines long ; sepals nearly as long, often purple beneath : akenes 

 puberulent or glabrous, lenticulate, slightly margined, with 

 small, short beak : fruit in a globose to oblong head. Early 

 spring. British Columbia to California and Colorado. 



Var. ellipticus GREENE, Fl. Francis, 298. 1892. 

 R. ellipticus GREENE, Pitt. 2 : no. 1890. 3:92. 1896. 



Basal leaves elliptic-lanceolate to oblong, entire or only once 

 lobed on one side : petals often much narrower than in the type : 

 head of akenes drooping to the ground. Distributed with the 

 type in its lower altitudes and southern range. 



65. R. Macauleyi GRAY, Proc. Am. Acad. 15: 45. 1880. 

 R. nivalis REP. Chief Eng. U. S. A. 1878: 1833. Not 



Linn. 



Some of the roots thick and fleshy : plant 3 to 7 inches high ; 

 stem villous-hairy to glabrous, young leaves very villous on 

 margins : leaves thick, lanceolate to ovate-spatulate, entire ex- 

 cept toward the apex, there often coarsely or finely 2 to 10 

 toothed ; lower leaves petiolate, others sessile or on short, 

 sheathing petioles : petals obovate to flabelliform, crenulate, 5 

 to 7 lines long, yellow ; sepals shorter, densely coated beneath 

 with dark brown hairs; peduncles hairy : akenes smooth, some- 

 what compressed, slightly margined ; styles linear-subulate, 

 persistent, nearly straight : head of fruit ovate to oblong or 

 cylindric. Near snow line, 11,500 feet altitude in La Plata 

 mountains and San Juan Co., Colo. 



66. R. nivalis LINN. Sp. PI. 553. 1753. 



R. sulphureus SOLAND. in Phipp's Voy. 202. 1774. 



A short caudex with slender roots : plant pubescent or be- 

 coming glabrous below, 3 to 7 inches high : lower leaves cune- 

 ate-flabelliform to reniform, about 3-lobed or deeply cleft ; lobes 

 sometimes notched ; upper leaves subsessile, about 5-lobed or 

 parted, divisions linear-oblong, entire : petals yellow, obovate 

 to roundish, sometimes emarginate, 3 to 4 lines long; sepals 

 shorter, densely wooly : akenes rather turgid ; beak subulate. 

 Greenland, Hudson Bay region, Alaska, Hall island, Behring 

 Sea, south in Rockies to Lat. 55, Northern Asia and Europe. 



67. R. natans C. A. MEYER ex Ledeb. Ic. t. 114. 1830. 

 R. radicans C. A. MEYER ex Ledeb. Ic. t. 116. 1830. 

 R. Purshii TORR. Ann. Lye. N. Y. 2: 162. 1828. 

 Not Richards. 



