RANUNCULACEAE OF IOWA. 133 



coast, and in the Rocky Mountains extending southward 

 to Arizona. It is also found in Europe. The flowers and 

 fruits of these two species apparently present no constant 

 differences ; they are to be distinguished only by their 

 leaves. 



Our specimens are from Emmet, Johnson, and Musca- 

 tine counties. Prof. Fink reports the species from Fayette 

 county. 



Prof. Arthur in his Flora of Iowa, p. 37, Appendix, has 

 the following note concerning this species: "Ranuncu- 

 lus aquatiljs L. var. stagnatilis DC. (R. divaricatus 

 of Gray's Manual.) 



" 'Frequent forms occur connecting this variety with 

 the last. It can hardly be R. divaricatus Schrank, as 

 European and Asiatic specimens of that species show a 

 well-defined lamina to the segments of the leaves, while in 

 American specimens they are always filiform.' Watson^ s 

 Rep. in King' 's Exp." 



Arthur, Contr. to the Flora of Iowa, pp. 5 and 37; Fink, Proc. Iowa 

 Acad, of Sciences, vol. 4, p. 83; Fitzpatrick, Proc. Iowa Acad, of 

 Sciences, vol. 5, p. 135; Manual of the Flowering Plants of Iowa, p. 3; 

 Barnes, Reppert and Miller, Proc. Davenport Acad, of Nat. Sciences, 

 vol. 8, p. 201; MacMillan, Met. Minn. Valley, p. 248. 



OXYGRAPHIS Bunge, Verz. Suppl. Fl. Alt. 46. 1836. 



Oxygraphis cymbalaria (Pursh) Prantl . Seaside 

 Crowfoot. 



Perennial, low, smooth, spreading by long, rooting run- 

 ners ; leaves clustered at the roots and on the joints of the 

 runners, long-petioled, cordate or kidney-shaped, crenate; 

 scapes 1-several-flowered, sometimes leaf-bearing toward 

 the base ; petals 5 or sometimes as many as 8 or even 12 ; 

 each with a small nectar pit near the base ; stamens and 

 pistils many; head of fruit oval or oblong; achenes com- 

 pressed, longitudinally striate. Ranunculus cymbalaria 

 Pursh, Fl. Am. Sept., p. 392, 1814; Oxygraphis cymba- 



