212 Illinois State Laboratory of Natural History. 



by different authors assigned to Galyptospora, Melampsorella, 

 Phraymospora and Thekopsora. Admitting all these as genera 

 of equal rank, the characteristics may be given as follows: 



Teleutospores produced beneath the cells of the epidermis: 



Teleutospores one-celled MELAMPSORA. 



Teleutospores divided PHRAGMOSPORA. 



Teleutospores produced in the cells of the epidermis. 



Teleutospores one-celled, colorless MKLAMPSORELLA. 



Teleutospores divided, colored: 



Sori small, with uredo THEKOPSORA. 



Sori broadly confluent or effused, without uredo, 



CALYPTOSPORA. 



With the single exception of Melampsora Gceppertiana 

 (Calyptospora Gfrppertiana, Ktihn ) on various species of Vac- 

 ciniitw, no supposed aecidium form has been found; in this 

 case the almost universal association of the teleutoform on 

 Vaccinium. and one or more species of Peridermiurn on Piint* 

 and Abies, seems to strongly indicate their genetic relation. 

 Other observations corroborate the supposed connection, so that, 

 in Europe at least, we may accept the matter as a fact that this 

 species of Melampsora and JEddium ( Per idermmm) columnar e* 

 Alb. & Schw., are alternate forms. In America, Peridermmm 

 iHilsamen-iH, Peck, seems to be associated with the teleutoform, 

 but whether P. Jtahameum and P. columnare are specifically 

 identical has not been determined. See Farlow, Appalachia, 

 Vol. III. (1884) p. 241 et seq. 



M. epilobii, (Pers.) Fkl. 



II., III. Hypogenous. Uredosori scattered, minute, hemi- 

 spherical, then opening by a circular stoma; uredospores obo- 

 vate, sometimes varying to subglobose and oblong, epispore 

 thin, sharply echinulate, each produced on a pedicel, orange- 

 yellow, 12-15 by 14-18 /*; teleutosori irregular, scattered, often 

 confluent in irregular crust-like areas, becoming chestnut- 

 brown, or at length darker; teleutospores mostly one-celled, 

 often divided by a septum which is horizontal, oblique, or ver- 

 tical, cuboidal or elongated, epispore thin, smooth, 21-39 /* long. 



