RANUNCULACEAE. 



[VOL. II. 



21. Ranunculus bulbosus L,. Bulbous 

 Buttercup. (Fig. 1615.) 



Ranunculus bulbosus L,. Sp. PI. 554. 1753. 



Erect from a bulbous-thickened base, hairy, 

 6 / -i8 / high. Leaves petioled, 3-divided, the ter- 

 minal division stalked, the lateral ones sessile or 

 nearly so, all variously lobed and cleft, flowers 

 bright yellow, about i' broad; petals much longer 

 than the reflexed sepals, obovate, rounded; head 

 of fruit globose, 5 // -6 // broad; achenes com- 

 pressed, very short-beaked. 



In fields and along roadsides, quite common in 

 most sections of our area. Naturalized from Europe. 

 May-June. In England the name Buttercups is 

 chii-tly applied to this species and to R. repens and 

 R.acris; called also in iniddk- Knglish Kingcups, 

 Goldcups, Butter-flown sand Blister-flowers. May- 

 July. 



22. Ranunculus Pennsylvanicus L. f. 



Bristly Buttercup. 



(Fig. 1616.) 



Ranunculus Pennsyli'anicus I,, f. Suppl. 272. 1781. 



Erect, branching, pilose-hispid, i-2 high, 

 leafy. Leaves thin, 3-dividcd; divisions deeply 3- 

 cleft, the lobes lanceolate, cuneate, acute, in- 

 cised; flowers yellow, 3"-4" wide; petals equal- 

 ling the reflexed sepals or shorter; head of fruit 

 oblong or^cylindric (3" thick, sometimes 6" 

 long); achenes smooth, pointed with a sharp 

 beak one-third their length; receptacle hairy. 



In wet, open places, Nova Scotia to Georgia and 

 west to the Rocky Mountains and British Columbia. 

 June-August. 



23. Ranunculus Macounii Britton. 

 Macoun's Buttercup. (Fig. 1617.) 



Ranunculus hisfiidus Hook. Fl. Bor. Am. i: 19. 

 1829. Not Michx. 1803. 



Ranunculus Macounii Britton, Trans. N. Y. Acad. 

 Sci. I*: 3. 1892. 



Erect or diffuse, hairy, branching, i-2 high. 

 Leaves 3-divided, the blade 2 / -3 / long, the divi- 

 sions broadly oblong, acute, cuneate, variously 

 cleft and lobed; flowers $"-6" broad, yellow, 

 the petals exceeding the spreading or slightly 

 reflexed calyx; head of fruit oblong, 4" thick; 

 achenes smooth, pointed with a sharp beak about 

 one-fourth their length. 



Western Ontario. Minnesota and Iowa west to the 

 Pacific Coast, extending south in the Rocky Moun- 

 tains to Arizona. Our description probably in- 

 cludes more than one species. Summer. 



