GENUS 20. 



CROWFOOT FAMILY. 



109 



13. Ranunculus Alleni Robinson. Allen's But- 

 tercup. Fig. 1907. 



Ranunculus Alleni Robinson, Rhodora 7: 220. 1905. 



Sparingly pubescent, 4'-8' high, usually branched. 

 Basal leaves long-petioled, orbicular to reniform, 

 7"-n' wide, coarsely crenate or incised, broadly 

 cuneate to subcordate at the base ; cauline leaves 

 sessile or nearly so, deeply cleft or parted into 3-5 

 mostly oblong or elliptic segments; flowers bright 

 yellow, 5i"-65" broad, the petals broad, not twice 

 exceeding the loosely villous calyx ; head of fruit 

 ovoid to oval ; achenes obliquely obovoid, glabrous, 

 minutely beaked. 



In moist grounds, Quebec. Aug. Confused with R. 

 pedatifidus in our first edition. 



14. Ranunculus ovalis Raf . Prairie Crow- 

 foot. Fig. 1908. 



Ranunculus ovalis Raf. Proc. Dec. 36. 1814. 

 Ranunculus rhomboideus Goldie, Edinb. Phil. Journ. 

 6 : 329. 1822. 



Pubescent, branching, 6'-i8' high. Lower and 

 basal leaves oval, oblong, or ovate-oblong, long- 

 petioled, the blade i' in length or more, crenate 

 or slightly lobed, obtuse, the base more or less 

 cuneate, rarely subcordate ; upper cauline leaves 

 sessile or short-petioled, deeply divided into 3-7 

 linear or oblong obtuse lobes ; flowers yellow, 

 9"-! 2" broad, the petals narrow and much exceed- 

 ing the calyx ; head of fruit spherical ; carpels and 

 achenes oval or orbicular, minutely beaked. 



In fields and on prairies, Labrador ( ?), Quebec and 

 Ontario to Saskatchewan, Alberta, Illinois, Wiscon- 

 sin and Nebraska. March-May. 



15. Ranunculus Harveyi (A. Gray) Brit- 

 ton. Harvey's Buttercup. Fig. 1909. 



Ranunculus abortivus var. Harveyi A. Gray, Proc. 



Am. Acad. 21 : 372. 1886. 

 R. Harveyi Britton, Mem. Torr. Club 5 : 159. 1894. 



Glabrous, stem erect, slender, branched, 8'-i8' 

 tall, from a cluster of narrowly fusiform roots. 

 Leaves thin, the basal and lower ones long- 

 petioled, reniform or suborbicular, obtusely 

 crenate or somewhat lobed, s"-i8" wide, cordate, 

 or some of them truncate at the base, the upper 

 sessile or nearly so, deeply 3-cleft or 3-parted 

 into linear or narrowly oblong entire or few- 

 toothed obtuse segments ; flowers bright yellow, 

 6"-o/' broad; petals 4-8, oblong, 4 or 5 times as 

 long as the reflexed sepals; head of fruit globose, 

 2" in diameter; achenes oblique, compressed, 

 tipped with a minute straight beak. 



On dry hillsides, Missouri and Arkansas. April- 

 May. 



