136 Wisconsin Academy of Sciences, Arts and Letters. 



231. Aecidium convallaeiae Schum. 



On Polygonatiim hiflorum Ell. and P. giganteum Dietr. La Crosse, 

 Pammel. Spermogonia, probably of this species, on Smilacina 

 racemosa Desf. 



232. Aecidium sambuci Schw. 



On Sambuciis canadensis L. La Crosse, Pammel. 



233. Aecidium fraxini Schw. 



On Fraxinus samhucifolia Lam, Kirkland, La Crosse, Pammel, 



234. Aecidium ranunculacearum, D C, 



On Anemone dichotoma L, La Crosse, Pammel. 

 This species includes, in part, the aecidium of Uromyces dactylidis 

 Otth., which occurs on grasses, according to Schroeter and Plowright, 

 while Puccinia arundinacea D C. also has its aecidium on Ranunculus, 

 according to Cornu (Comptes Rendus, June 26, 1882). 



To be distinguished is, perhaps — 



235. Aecidium thalictri Grev, 



On TTialictrum dioicwm L. Madison; La Crosse, Pammel. 



236. Aecidium ranunculi Schw. 



On Banuncidus abortivus L. Madison, in spring. 

 Quite distinct in its habit from either of the preceding. 



237. Aecidium punctatum Pers, {A. quadrifldum D C). 



Not uncommon on leaves of Anemone nemorosa L. Less abundant 



on Anemone acutiloba Lawson, in May, Madison, 



The typical form with a wide 4-lobed margin is unusual, most of the 



specimens having a narrow border divided into small lobes. The form on 



Hepatica acutiloha is very distinct from A. hepaticae Beck, in its brown 



spores, I do not distinguish it from some forms on A. nemorosa. 



238. Aecidium dicentrae, n, sp. 



On leaves of Dicentra cucidlaria D C, in company with Perono- 

 spora corydalis DeBarj, Madison, 



Hypophyllous, scattered. Spots none, Peridia short, pale yellow, irregu- 

 larly torn or finely many-lobed, ,3 mm. in diameter, Peridial cells granu- 

 lated, polygonal, more or less isodiametric, averaging 13x15 //, Spores 

 deep orange, thin-walled, smooth, nearly spherical or somewhat polygonal; 

 13-20 M, usually about 16 /<; wall colorles?. 



A beautiful species, collected by Mr, Pammel in May, 1884, The aecidia 

 are accompanied by small violet or brown spermogonia, like those of 

 A. punctatum. 



239. Aecidium pammelii, d. sp. 



On leaves of Euphorbia corollata L, La Crosse, Pammel. 



