888 



24. AcchViuin Ildnunculaccdntin DC. (in part). 

 On KAXTNCULACEAE: 



Ci/rtorhi/iiclia runuucuUna Niitt., Colorado. 



Ranunculus hnJhosus L., Connecticut. 



Ranunculus rccurvatus Poir., Missouri. 

 DISTRIBUTION: Connecticut west to Colorado and Missouri. 



These differ slightly from the preceding by the peridia being much 

 less crowded and the substratum not being thickened. They may prove 

 to be different. 



25. Aeckliuni TlialictrL Am. Authors. 

 On RANUXCULACEAE : 



Isopjiruni hiternatum (Raf.) T. & G., Iowa. 



Sijndcsmon thalictroides (L.) Hoffm., Indiana, Missouri. 



TUalictruni (lioicu)n L., Massachusetts, .Minnesota, Vermont. 



'J'halictruin polygamutn Muhl., Colorado. 



Tlialictrum jiurpurascens L., Nebraska, South Dakota. Wisconsin. 



Thalictruia thyrsoideum Greene, North Dakota. 



Thalictnihi sp., Idaho; Newfoundland. 

 DISTRIBUTION : Northern United States and Canada. 

 EXSICCATI : Barth. Fungi Columb. 2-'i05; Brenckle, Fungi Dak. 10',; 



Ellis & Ev. Fungi Columb. 1390; Rab.-Wint. Fungi Eu. 3322; Rab.- 



Wint.-Paz. Fungi Eu. 3836. 



The aecia on ThaUctrum and related hosts are very closely related, 

 and cultures are necessary to segregate them with certainty. Those placed 

 together here are slightly different as to form and habit from those al- 

 ready connected with lironius and AtiropijronAwXvMnWwz I'urcinac. 



20. Accidlum Fendlcri Tracy & Earle, IM. Baker. 1:17. 1901. 

 On BERBERIDACEAE : 



Bcrhcris Fendlcri A. Gray. Cohirado. 

 TYPE LOCALITY : Mancos, Colorado, on Bcrhcris Fendlcri. 

 DISTRIBUTION: Known only from Colorado. 



This differs sliu'htly in habit from Accidlum lirrhcridis and may prove 

 distinct, al1hon,t;li it is very similar. 



27. Aecidiuni Diccntrue Trel. Trans. Wis. Acad. Sci. 6:i:!(;. (Nov.) 

 1884. 

 Accidium. IUccntrac Burr. P.(j1. (iaz. 9:ls;t. (Dec.) 1884. 



