THE UREDINALES FOUND UPON THE ONAGRACEAE 55 1 
To Mr. Orton are also due thanks for finding that Aecidium 
Isnardiae Lagerh. Tromso Mus. Aarsh. 17: 102. 1895, described as 
upon leaves of Isnardia from Ohio, collector uncertain, belongs here. 
Isnardia is a synonym of Ludwigia. Farlow, Bibl. Index i^: 59. 
1905, gives some further data regarding Aecidium Isnardiae. 
Puccinia Jussiaeae Speg., being the oldest name for this species, 
is, therefore, to be used. 
This species, with long, narrow teliospores, does not show a cor- 
relation with Puccinia Epilobii-tetragoni, It is more definitely cor- 
related with Puccinia Circaeae, as is discussed under the short-cycled 
species, in this paper. 
10. Puccinia Epilobii-Fleischeri Ed. Fischer, Bull. Herb. Boiss. 
1897:394- 1897. 
Literature: Saccardo, Syll. Fung. 14: 299. 1899. Sydow, Monogr. Ured. i: 
426. 1903. Fischer, Beitr. Krypt. Schweiz 2^: 154-155. 1904. 
This species, known only from Europe upon Epilohium Fleischeri 
Hochst. (Chamaenerion Fleischeri Fritsch.) is without a uredinial stage. 
As Fischer (/. c.) states, it is nearly related to Puccijiia Epilobii- 
tetragoni, excepting in the lack of uredinia. Fischer notes some small 
differences in the telial stages of the two species; yet this is no doubt 
correlated with Puccinia Epilobii-tetragoni, as previously indicated. 
It seems to be established that uredinia do not occur in Puccinia 
Epilobii-Fleischeri; Fischer lists several collections bearing aecia and 
telia together. It is worthy of note that this species occurs at high 
altitudes, i. e., in Switzerland. As already noted, uredinia of Puccinia 
Epilobii-tetragoni often occur less abundantly at higher altitudes 
in western North America. While no host-species of Epilobium has 
been found there which conspicuously lacks in the development of the 
uredinial stage, and while the evidence of the fixity of such a character 
in America is lacking, it is to be expected that a form agreeing with 
Puccinia Epilobii-Fleischeri may be found in the higher western 
portions of our continent. 
Cultures have, apparently, not yet been made to decide just what 
the life cycle is in Puccinia Epilobii-Fleischeri under various con- 
ditions. 
The short-cycled species of Puccinia upon the members of the 
Onagraceae present some difficulties. This is more directly due to the 
