206 



Mycologia 



Tabular View of the Aecial Host Families 



Class 



Order 



Family 



Fam. No.* 



Generaf 



Monocotyledoneae 

 Dicotyledoneae < 





Liliales 



Urticales 



Rosales 



Myrtales 



Primulales 



Polemoniales 



Rubiales 



Campanulales < 





Smilaceae 



Urticaceae 



Grossulariaceae 



Lythraceae 



Onagraceae 



Primulaceae 



Phrymaceae 



Caprifoliaceae 



Ciehoriaceae 



Carduaceae 



25 

 43 

 84 

 128 

 130 

 142 

 169 

 172 

 179 

 181 



I 

 2 

 I 

 I 



4 

 2 

 1 

 1 

 7 

 10 



* The number given here is the serial number of the families of the 

 angiosperms according to Britton & Brown, Illustrated Flora, 2d edition. 



f The numbers in this column indicate the number of genera in a family 

 known to bear aecia. 



Under the accounts of the species it has been the aim to in- 

 clude various notes which might not find a place in a purely sys- 

 tematic presentation. No attempt has been made to describe the 

 aecial stages and for the sake of brevity the descriptions of the 

 uredinial and telial stages have been confined chiefly to the spores, 

 the sori being mentioned in only a few instances because they do 

 not furnish diagnostic characters as a rule. Nineteen species 

 are now recognized, of which twelve have their life-histories 

 worked out, three possess amphispores, and three are described 

 as new. Six of the species are common to Europe and North 

 America, one to Asia and North America, and one is known to 

 occur also in South America. A total of 139 species of Carex 

 are listed in this paper as hosts for the species of Puccinia. In 

 191 3, 106 Carex species were known to serve as hosts which were 

 then represented by 1200 North American collections in the Arthur 

 Herbarium. 2 It is not known how many collections have been 

 added during the last three years but the herbarium has been in- 

 creasing rapidly. 



No effort has been spared to make the host determinations as 

 authentic as possible and in this connection thanks are due to Dr. 

 Theo. Holm, of Washington, D. C, and to Mr. K. K. Mackenzie, 

 of New York, for their painstaking examination of specimens 



2 Other interesting statistics regarding the North American Carex rusts 

 are given by Professor Arthur in Mycologia 5: 240-244 (1913). 



