233 



For some time past the writer has had access to the Arthur herbarium, 

 and at tbe suggestion of Dr. J. C. Arthur, made a list of the hetercecious 

 species of Puccinia having their teliospores on grasses, whose complete life 

 histories are known. The teliospores of the short-cycled forms appearing 

 on the secial hosts of these rusts were compared with the teliospores of the 

 long-cycled forms with the intention of compiling such a list as Fischer 

 published. The following combinations were found to appear as good cor- 

 relations : 



LIST OF CORRELATIONS. 

 Rust. Telial Host. Aecial Host. 



f Festucca 



(Puccinia Crandallii Pammel & Hume s .,, 

 , . J [Poa bymphoncarpos 



[Puccinia Symphoricarpi Hark. Symphoricarpos 



(Puccinia simillima Arth Phragmitis Anemone 



2 - 



[Puccinia Anemones-virginiana Schw. . . Anemone 



(Koeleria 



1 Puccinia Stipce Arth \Oryzopsis . 



[Stipa 



3. 



Puccinia Grindelice Peck. 



Bigelovia 

 Chrysopsis 



Chrysothamnus 

 Grindelia 



Gutierrezia 



Aster 



Bigelovia 



Chrysopsis 



Chrysothamnus 



Erigeron 



Grindelia 



Gutierrezia 



Lygodesmia 



Nothocalais 



Senecio 



Solidago 



PH (Castilleja 



[Puccinia Andropogonis Schw Andropogon \Dasy stoma 



4.-J (Penstemon 



[Puccinia Seymerice Burrill Dasy stoma 



r ^Puccinia pustulata (Curt.) Arth Andropogon Comandra 



' [Puccinia Comandrce Peck Comandra 



(Arabis 



(Puccinia monoica (Peck) Arth IKazleria Parrya 



(■ J [J risetum, \ochoenocrambe 



[Puccinia Holboellii (Horn.) Rostr. . . . Arabis [Smelowskya 



7 (Puccinia Agropyri Ell. & Ev Agropyron Anemone 



' [Puccinia DeBaryana Thuem Anemone 



(Puccinia rubella Arth Phragmit 



is. 



(Rheum 



§ 1 * \liumex 



[Puccinia ornata A. & H Rumex 



g (Puccinia rhamni Wettst Avena Rhamnus 



' [Puccinia Mesneriana Thuem Rhamnus 



The last two combinations in this list are the ones noted by Dietel. 



