366 BROOKLYN BOTANIC GARDEN MEMOIRS 



Tranzschel (155) suggests the possibility of two other races, one on 

 Car ex pallescens and a second on Car ex vaginata. 



Puccinia Centaureae-Caricis Tranz. Tranzschel (155) suggests 

 that the various Centaur ea-Car ex rusts may best be grouped under the 

 above name. The following rusts are thus included : 



1. Puccinia Caricis-montanae Ed. Fischer. Bandi (15) claims to have 



found evidence for the occurrence of specialization in this 

 heteroecious rust which forms its uredospores and teleuto- 

 spores on Carex montana and its aecidiospores on species of 

 Centaurea. He mentions two specialized races based on 

 the choice of aecidial host : 



a. On Centaurea scabiosa. 



b. On Centaurea montana. 



2. Puccinia tenuistipes Rostrup; aecidial stage on Centaurea Jacea; 



uredo and teleuto stages on Carex muricata. 



3. Puccinia arenariicola Plowr.; aecidial stage on Centaurea nigra; 



uredo and teleuto stages on Carex arenaria. 



4. Puccinia Jaceae-leporinae Tranz.; aecidial stage on Centaurea 



Jacea; uredo and teleuto stages on Carex leporina. 



5. Puccinia Jacea-capillaris Tranz.; aecidial stage on Centaurea Jacea; 



uredo and teleuto stages on Carex capillaris. 



6. An unnamed rust with aecidial stage on Centaurea orientalis; uredo 



and teleuto stages on Carex gynobasis. 

 Puccinia extensicola Plowr. This name is applied to a group of 

 rusts which have their aecidial stage on Compositae and their uredo 

 and teleuto stages on species of Carex. Arthur (2, 3, 5, 6, 8, 9, 10, 

 II, 13) has listed a number of forms under distinct names, but later 

 suggests that they are merely specialized races of Puccinia extensicola. 

 The following rusts are regarded as belonging here : 



1. Puccinia Caricis-Erigerontis Arth.; aecidial stage on Erigeron 



annuus, E. canadensis and E. philadelphicus ; uredo and teleuto 

 stages on Carex festucacea. 



2. Puccinia Caricis-Asteris Arth.; aecidial stage on Aster acuminatus, 



A. adscendens, A. cordifolius, A. paniculatus and Solidago 

 graminifolia; uredo and teleuto stages on Carex f estiva, C.foenea 

 C. retrorsa, C. rosea, C. scoparia and C. trisperma. 



3. Puccinia Caricis-Solidaginis Arth. ; aecidial stage on Solidago caesia, 



S. canadensis, S. graminifolia, S. rigida, S. serotina and S. 

 ulmijolia; uredo and teleuto stages on Carex Jamesii, C. 

 scoparia, C. sparganoides and C. stipata. 

 It is suggested that a distinct race may occur on Carex scoparia 

 and Solidago graminifolia. 



Puccinia silvatica Schroet. This rust is reported as having its 



