May 1907] Third Supplement to New Genera 123 



[ Aecidiomycetae. ] 



Physopella Arthur, n. g. Uredinaceae. Resultats scien- 

 tifiques du Congres international de Botanique Wien, 1905 : 338. 

 19C6. 



"Pyknien und Aecien unbekannt. Uredinien von zahlreichen 

 eingebogenen Paraphysen umgeben, ohne Peridium; Uredinio- 

 sporen einzeln auf Stielen gebildet, M,embran farbig, stachlig, 

 Keimporen undeutlich ; Telien unter der Epidermis, mehr oder 

 weniger linsenformig, mehr als eine Schicht dick. TeHosporen 

 kompakt, Membran farbig, diinn, oder die obersten Zellen oben 

 verdickt." 



[ Aecidiomycetae. ] 



PoLiOMA Arthur, n. g. Uredinales. Journal of Mycology 

 13. 29. 1907. 



"Cycle of development includes pycnia and telia, both sub- 

 epidermal. 



"Pycnia flask-shaped or globoid, central cavity usually large, 

 ostiolar filaments apparently wanting. 



"Telia erumpent, somewhat indefinite, without peridiura or 

 paraphyses ; teliospores pedicelled, two-celled, wall very pale or 

 colorless, homogenous, smooth, one pore in each cell and apical. 

 Spores usualy germinate upon maturity." 



[Aecidiomycetae.] 



PoLYTHELis Arthur, n. g. Aecediaceae. Resultats scien- 

 tifiques du Congres international de Botanique Wien, 1905:341. 

 1906. 



"Merkmale der Gattung Tranzschelia, aber ohne Aecien und 

 Uredinien." 



[ Aecidiomycetae. ] 



Prospodium Arthur, n. g. Uredinales. Journal of Mycol- 

 ogy. 13:31- 1907- 



"Cycle of development includes pycnia, uredinia and telia, 



all subcuticular. 



"Pycnia hemispherical, hymenium flat, without ostiolar fila- 

 ments. 



"Uredinia early naked, encircled by paraphyses; uredinio- 

 spores borne singly on pedicels, wall colored, echinulate, often 

 with a gyroscopic layer. 



"Telia erumpent, surrounded more or less by paraphyses; 

 teliospores two-celled by transverse septum, wall colored, with 

 a thin, hygroscopic, hyaline layer, sparsely papillose, pores one 

 in each cell, apical in upper cell, near the pedicel in lower cell; 

 pedicel refractive, usually appendaged." 



[Aecidiomycetae.] 



Spirechina Arthur, n. g. Uredinales. Journal of Mycol- 

 ogy, 13:30- 1907- 



