RANUNCULACEAE OF IOWA. 119 



Clematis viorna L. Sp. PL p. 543. 1753. Leather- 

 flower. 



This species was reported as belonging to the flora of 

 Iowa by Dr. C. C. Parry in Owen's Rep. Geol. Snr. Wis., 

 Iowa, and Minn., p. 608, 1852, and by Prof. Bessey in his 

 contributions to the Flora of Iowa in Fourth Report of 

 Agricultural College, p. 90, 1872. He gives Polk and Story 

 counties as localities. Prof. Hitchcock does not list this 

 species in his catalogue of Anthophyta and Pteridophyta 

 of Ames, published 18 years later. Prof. Bessey does not 

 list Clematis simsii Sweet. (C '. pitcheri T . & G.). Prof. 

 Arthur in his contributions to the Flora of Iowa, p. 5, 1876, 

 reports C. viorna L,., C. simsii Sweet (C. pitcheri T. & 

 G.), and C. virginiana L. Clematis viorna L,. very much 

 resembles C. simsii Sweet except that the persistent styles 

 are plumose throughout in the latter species. 



We have seen no reliable specimens from Iowa. The 

 so-called specimens which have fallen into our hands are 

 Clematis simsii Sweet. The range of the species as 

 given by Britton and Brown is southern Pennsylvania to 

 Ohio and West Virginia, south to Georgia and Tennessee, 

 a range much east of our limits. In all probability the 

 species does not belong to our flora; specimens which 

 have been referred here belong to the species Clematis 

 simsii Sweet. 



Atragene Americana Stms, Bot. Mag. PI. 887.1806. 

 A perennial, trailing or twining vine, with opposite, 

 petioled, trifoliolate leaves, and large, solitary, axillary flow- 

 ers; leaflets ovate, acute, entire or toothed, somewhat cor- 

 date; sepals, large, purplish blue; petals small, spatulate; 

 stamens many; styles persistent, plumose. Clematis 

 vcrticillaris DC. Syst. Nat., vol. 1, p. 166, 1818. 



The only Iowa specimen we have of this species was sent 

 by Herbert Goddard of Decorah, Winneshiek county, Iowa. 

 It bears the label "E. W. D. Holway, col., 5-27-'93.'> 



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