212 //////o/,s- State Tj((}>()raf(>nj of Natural Histori/. 



by diifereut authors assif^'iied to Calyptospora, Mel<(iiij)>«jrella. 

 Ph.raginosjwra and Thehopsora. Admitting- all these us genera 

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



Teleutospores produced beneath the cells of the epidermis: 



Teleutospores (me-celled Melampsora. 



Teleutospores divided Phragmospora. 



Teleutospores produced in the cells of the epidermis. 



Teleutospores one-celled, colorless Melampsorella. 



Teleutospores divided, colored: 



Sori small, with uredo Thekopsora. 



Sori broadly confluent or effused, without uredo, 



Calyptospora. 



With the single exception of Melampsora Gcpppertiana 

 (Cabjptosjjora Ga'ppcrtlaiai, Ktlhn) on various species of Vac- 

 cinia tu^ no supposed ajcidium form has been found; in this 

 case the almost universal association of the teleutoform on 

 Vacciiiiam. and one or more species of Feridernmini on Pin us 

 and Abies, seems to strongly indicate their genetic relation. 

 Other observations corrol)orate the supposed connection, so that, 

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

 species of Melampsora and u'Ecidiam ( Pe rider raia m ) cohimnare, 

 Alb. & Schw\. are alternate forms. In America, Peridermium 

 halsa)iu'iim. Peck, seems to be associated with the teleutoform, 

 but whether P. halsaineam and P. coluiintare are specifically 

 identical has not been determined. See Farlow, Appalachia, 

 Vol. TIT. (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. 



