

664 Arthur: New Species of Uredineae 



* 



inconspicuous species, found in only one locality. In the same 

 locality Aecidium Boltoniae was found, and nowhere else, and this 

 exclusive association naturally suggests that the two forms are 

 genetically related. The uredo- and teleutospores are formed be- 

 neath the epidermis of the mesophyll, and on the upper surface, 

 beneath the bulliform cells. 



Aecidium boltoniae sp. no v. 



Spots pale yellow ; spermogonia amphigenous, waxy orange ; 

 spermatia oblong to ovate, 3x5 p. ; peridia mostly hypo- 

 phyllous in well-defined groups, shallow, border irregular; 

 spores pale yellow, subglobose, 13-17 /A inconspicuously verru- 

 cose ; wall thin. 



On leaves of Boltonia asteroides (L.) L'Her., Spirit Lake, Iowa, 

 June 15 and 22, 1900, and June 18, 1901. J. C. Arthur. Host 

 growing in wet ground in the midst of Panicalaria Americana. 



Aecidium magnatum sp. nov. 



Spots pale, circular; peridia hypophyllous, cylindrical, some- 

 times elongated, border jagged ; spores yellow, subglobose, large, 

 26-37 t 1 * prominently, closely and uniformly verrucose. 



On leaves of Vagnera stellata (L.) Morong {Smilacina stellata 

 Desf.). Valley of the Teton, northern Montana, July, 1889. r. 

 W. Anderson. This is readily distinguished by the size and rough- 

 ness of the spores from the aecidium on the same host belonging 

 to Puccinia majanthae (Schum.) A. & H. 



Aecidium anograe sp. nov. 



Spots reddened, somewhat thickened and bullate ; peridia 

 densely clustered, mostly hypophyllous, elongated, cylindrical, 

 border torn into narrow fringe, at length somewhat revolute ; 

 spores yellow, 22-26 p, subglobose, evenly verrucose; wall 

 thick, 3 [i. 



On leaves of Anogra pallida (Lindl.) Britt. Type collection 

 from Long Pine, Neb., May 23, 1900, No. 1325. Subsequent 



collection from Merriman, Neb., June 6, 1900. Both by 

 Bates. Spores much larger and rougher than in Aecidium Pecku 

 De T. 



