PLANTS OF IOWA 151 



UNIFOLIUM, Adams. 



1932. U. canadensis, (Desf.) Greene. Two-leaved Solomon's 



Seal. 



In moist woods. 

 SALOMONICA, Heist. 



1933. 8. lifiora, (Walt.) Britton. Hairy Solomon's Seal. 

 Unfrequent. 



1934. 8. commutata, (R. & S.) Britton. Smooth Solomon's 



Seal. 

 Common. 

 TRILLIUM, L. 



1935. T. sessile, L. Sessile-flowered Wake-Robin. 

 Common in rich woods. 



1936. T. recurvatum, Beck. Prairie Wake Robin. 

 Infrequent. 



1937. T. nivale, Riddell. Early Wake Robin. 

 Not rare. 



1938. T. grandiflorum, (Michx.) Salisb. Large Flowered 



Wake Robin. 

 Not rare. 



1939. T. erectum, L. Ill Scented Wake Robin. 

 Common in woods. 



1940. T. cernuum, L. Nodding Wake Robin. 

 Infrequent. 



SMILACE^. SMILAX FAMILY. 



SMILAX, L. 



1941. S. herbacea, L. Carrion-flower. 

 Common in thickets. 



1942. 8. ecirrliata, (Engelm.) S. Wats. Upright Smilax. 



Frequent in woods. 



1943. 8. rotundifolia, L. Greenbriar. 

 Common. 



1944. 8. hispida, Muhl. Hispid Greenbriar. 

 Freqeunt in moist woods. 



1945. 8. pseudo-china, L. Long Stalked Greenbriar. 

 Not common. 



