472 MINNESOTA BOTANICAL STUDIES. 



tapering into the persistent style ; fruit in globose head. High 

 altitudes, Guatemala. Also near Bogota, U. S. of Colombia. 



15. R. Bloomeri WATS. Bot. Calif. 2: 426. 1880. 



R. Chilensis HOOK. & ARN. Bot. Beech. 134. 1841. 

 Stem ascending, i to 2 feet long, sparsely hairy or becoming 

 glabrous : radical leaves bright green, long-petioled, some 

 broadly cordate or ovate, coarsely dentate or incised, others 3- 

 parted, some divided into 3 leaflets which are short-stalked and 

 the middle one often 3-lobed ; stem leaves short petioled : petals 

 yellow, 6 lines long, emarginate ; sepals shorter : akenes gla- 

 brous, 2 lines long, turgid ; beak slender, subulate, persistent. 

 San Francisco bay. 



16. R. hispidus MICHX. Fl. i: 321. 1803. 



R. Marilandicus POIR. in Lam. Encycl. 6: 126. 1804. 



R. repens var. Marilandicus TORR. & GRAY, Fl. 1:21. 

 1838. 



R. fascicularis BRITTON, PI. N. J. 3. 1881. 

 Appressed-pubescent, when young densely villous : stems 

 slender, ascending or spreading, ^ to 2 feet long : leaves pal- 

 mately 3-parted, or pedately or pinnately 3~5~divided ; the di- 

 visions ovate, or variable, middle one often stalked, others 

 usually sessile ; all often cuneate at base, sharply cleft or lobed : 

 petals 5 or more, light yellow, 3 to 6 lines long ; sepals half as 

 long, spreading : akenes broadly oval, lenticular, margined, ab- 

 ruptly tipped ; beak half their length, subulate, slightly curved ; 

 head ovoid to globose. Earliest spring. Canada through 

 Eastern and Middle States to Florida and Arkansas. 



17. R. bulbosus LINN. Sp. PI. 554. 1753. 



R. speciosus HORT. ex VILM. Fl. PL Terre i ed. 722. 



1865. 



Plant from a true bulb, erect, about i foot high, hairy : leaves 

 petioled, 3~5-parted, the divisions sometimes stalked, segments 

 lobed : flowers terminating the branches, bright yellow, large ; 

 petals large, obovate, shining above ; sepals much smaller, often 

 reflexed : akenes compressed, with short beak, borne in a glo- 

 bose head. Spring and summer. Persia, Europe, northern 

 Africa. The double form is perhaps best suited for culture. 



18. R. Icelandicus n. sp. 



Caudex short, roots fibrous : plant pubescent throughout : no 



