8 KANUNCULACEJS. (CROWFOOT FAMILY.) 



13. R. adoneus, Gray. Low, sparsely villous, becoming glabrous : stems 

 branching from the base, 1 to 3-leaved above, sometimes sannentose-decum- 

 bent and 2 to 3-flowered : leaves twice pedately parted, segments narrowly 

 linear : petals golden-yellow, twice exceeding the subvillous sepals : akenes 

 crowded in an oval head, turgid, with the rather long ensiform beak scarious- 

 winged on each edge. Proc. Acad. Philad. 1863, 56. High altitudes close 

 to the snow, Colorado and northward. 



= = Stems bearing more than one flower. 

 a. Dwarf (2 to 3 inches high). 



14. R. digitatus, Hook. Very glabrous : leaves few, petioled, digitately 

 lobed, the 3 to 5 segments narrowly lanceolate or oblong-spatulate, obtuse : 

 flowers 2 or 3, terminal, with reflexed sepals and 7 to 1 1 oblong cuneate pet- 

 als : akenes beaked with a subulate recurved style. In the Wahsatch, 

 N. Utah, and northward into British America. 



b. A foot or two high. 



15. R. affinis, R. Br. Radical leaves petioled, usually pedately multijid ; 

 cauline ones subsessile, digitate, with broadly linear lobes : akenes with re- 

 curved beaks in oblong-cylindrical heads, more or less pubescent. Colorado 

 and northward. 



Var. leiocarpllS, Trautv. Lower leaves usually lobed or crenate : flowers 

 small : carpels smooth or somewhat pubescent. Colorado. 



Var. cardiophyllus, Gray. Hirsutely pubescent: radical leaves round- 

 cordate, undivided or many-cleft ; cauline ones palmately many-cleft : flowers 

 an inch in diameter. Same range as the species. 



16. R. Nelsoni, Gray. Sparingly pilose : the simple radical leaves often 

 3 to 4 inches in diameter, more or less deeply 3-lobed ; the uppermost rarely 

 parted ; the lower usually cordate in outline : petals not more than 3 lines long, 

 exceeding the sepals : akenes pilose (sometimes glabrous), in a small head, 

 rigid, more or less scattered, bearing a very much hooked style of the same 

 length. Proc. Am. Acad. viii. 374. About Yellowstone Lake and far north- 

 ward. 



H -t- -i- Leaves all ternately divided. 



17. R. PennsylvanicUS, L. Hirsute with rough spreading bristly hairs : 

 stem stout, erect : divisions of the leaves stalked, somewhat ovate, unequally 

 3-cleft, sharply cut and toothed, acute : petals pale, not exceeding the sepals : 

 akenes not margined, pointed with a sharp straight beak, in oblong heads. 

 Colorado and northward, and in the Atlantic States. 



18. R. repens, L. Low, hairy or nearly glabrous : stems ascending and 

 some of them forming long runners : divisions of the leaves all (or at least the 

 terminal one) stalked, broadly wedge-shaped or ovate, unequally 3-cleft or 

 parted and variously cut : petals obovate, much larger than the spreading sepals : 

 akenes strongly margined, pointed by a stout straightish beak, in globular heads. 

 Across the continent. 



19. R. macranthus, Scheele. Stem erect, taller, more or less hirsute 

 with spreading hairs : leaves ternately or more frequently bi-ternately divided, 

 segments usually stalked, laciniately lobed and toothed : flowers large, with the 

 sepals strictly reflexed : akenes crowded in subglobose heads, about equalling the 



