Preliminary List of Wisconsin Parasitic Fungi. 135 



225. Abcidium peteksii B. & C. 



On Viola delphinifolia Nutt. Common, in spiing. Madison. 

 Peridia longer than those of the aecidium of Puccinia violae. 



226. Aecidium geranii D C. 



Very common, in spring, on leaves of Geranium maeulatuvi L. 



227. Aecidium grossulariae D C. 



On leaves, pedicels and flov^-ers of Bibes rotimdifoUum Mx., R. flori- 

 dum L'Her., R. eynosbati L., R. aureum Pursh and R. ruhruin L. 

 Every where, in spring. Madison; La Crosse, Pammel. 



This cannot ba distinguished from the European species, which is called 

 by Winter the aecidium of Puccinia grossulariae Gmel., with which he 

 identifies the American P. pidchella Pk. Though the aecidium is one of 

 the commonest of fungi everywhere east of the Mississippi, lam not aware 

 that its assumed teleutosiDoric form has been recorded for any locality but 

 the one given by Peck. Dr. Magnus, also, writing of this species as it oc- 

 curs in Germany, says "Aecidium grossulariae certainly is an isolated 

 aecidium, which belongs to a heteroecismal Puccinia, as I convinced my- 

 self some years since by observations on Ribes nigrum, R. grossidaria and 

 R. alpinum, in the vicinity of Berlin." * 



Since the above was written, Plowright, discussing British Uredineae, 

 says: ''As no Puccinia occurs on gooseberry leaves in this country, it is 

 clear Aecidium grossulariae, as we find it, is not a Pucciniopsis but is 

 probably a heteroecismal species." (Grevillea, XII., 36). the same con- 

 clusion is reached in Denmark, by Rostrup (Rev. Mycolgique, October 1884, 

 p. 211). 



228. Aecidium polygalinum Peck. 



On Polygala senega L. Madison; La Crosse, Pammel. 



229. Aecidium impatientatum Schw. 



Oq. Impatiens fulva '^ntt, axicS. I. jiallida Nutt. Madison; La Crosse, 

 Pammel; Sauk City, Liiders. Also collected at Hokah, Minn., by 

 Mr. Pammel. 



230. Aecidium jamesianum Peck. 



On Asclepias htberosa L., A. cornnti Dec, A. ovalifolia Dec. and 

 Acerates longifolia Ell. Stoughton; La Crosse, Pammel; Sauk 

 City, Liiders. 

 This is called the aecidium of Uromyces hoivei (Peck) by Mr. Arthur 

 (Bull Minn, xicad., XL, 25). 



The bright orange-red spores contrast beautifully with the pure white 

 peridia, much as in Roestelia aurantiaca Pk., and the thickening of their 

 walls, mentioned by Mr. Arthur, is very characteristic. 



* (.Verhandl. Bot. Verein, Prov. Brandenburg, v. 23, p. XXVII-XXVIII.) 



