126 NATURAL HISTORY BULLETIN. 



XX Plants more or less pubescent . 



§ Beak of the achenc strongly hooked. 



Ranunculus recurvatus Poir. in Lam. Encycl. 6: 

 125. 1804. Hooked Crowfoot. 



Stem 8-20 inches high, hirsute; leaves all similar, long- 

 petioled, broadly reniform, deeply 3-cleft, the divisions 

 cuneate, toothed and lobed beyond the middle; flowers 

 small, on long peduncles; calyx reflexed; petals shorter; 

 achenes compressed, tipped by a recurved beak which is 

 half their length. 



This species ranges from Nova Scotia to Manitoba, south 

 to Florida and Missouri. In Iowa it is known to occur 

 only in three counties situated on or near the eastern bor- 

 der. It occurs rather infrequently in woods, flowering in 

 May and June. Specimens before us are from Winneshiek, 

 Muscatine, and Johnson counties. Prof. Arthur and 

 Messrs. Nagel and Haupt report the species from Scott 

 county which report is confirmed by Messrs. Barnes, Rep- 

 pert and Miller. 



Arthur, Cotitr. to the Flora of Iowa, p. 5, 1872; Nag-el and Haupt, 

 Proc. Davenport Acad, of Nat. Sciences, vol. 1, p. 154; Fitzpatrick, 

 Proc. Iowa Acad, of Sciences, vol. 5, p. 135; Manual of the Flowering- 

 Plants of Iowa, p. 4; Shimek, Bull. Lab. Nat. Hist., vol. 3, p. 200; 

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

 vol. 8, p. 201. 



§§ Beak of the a eh en e short. 



(a) Introduced erect plants, in fields. 



Ranunculus acris L. Sp. PL, p. 554. 1753. Tall 

 Crowfoot or Meadow Buttercup. 



Stem 2-3 feet high, hairy; leaves of 3 sessile divisions, 

 the basal 3-7-divided, the divisions 3-cleft or 3-parted, the 

 segments cut into narrow or linear lobes; petals obovate, 

 2-3 times longer than the calyx ; head of fruit globose ; 

 achenes compressed; short-beaked. 



This species occurs infrequently in fields and waste places, 



