550 
G. R. BISBY 
of the same hosts, by their local character. The aecia are rather large, 
the aeciospores up to 2 1 /x in diameter, with thin walls. 
This species is shortly to be discussed in some detail by Kern. 
As is indicated later in this article, the teliospores of this species, 
upon Carices, resemble the teliospores of certain other rusts upon the 
Onagraceae. 
9. PucciNiA JussiAEAE Speg., Anal. Soc. Cienc. Argentina 12: 68. 
1881. 
{Puccinia Ludwigiae (Ell. & Ev.) Holway, N. Amer. Ured. i: 72. 1907.) 
Literature: Ell. & Ev., Proc. Acad. Phila. 155. 1893. Ell. & Ev., Bull. 
Torrey Club 22: 363. 1895. Saccardo, Syll. Fung. 14: 298. 1899; 21: 627. 1912. 
(See also below.) Sydow, Monogr. Ured. i: 438. 1903. Spegazzini, references 
below. 
Ellis and Everhart in 1895 described this Puccinia as on Nesaea 
verticillata, which was an error for Ludwigia poly car pa. (See Holway, 
/. c.) The name Puccinia Nesaeae was used, and perpetuated by 
Saccardo and Sydow. Ellis and Everhart had previously (1893), 
however, described the aecial stage of this fungus as Aecidium Lud- 
wigiae. 
This rust occurs upon various species of Ludwigia (Isnardia) in 
the central and southeastern portions of the United States. 
With this species, formerly known as Puccinia Ludwigiae ^ is 
placed Aecidium Jussiaeae Speg. and Puccinia Jussiei Speg., making 
the name for this species Puccinia Jussiaeae. C. R. Orton, in working 
upon Puccinia Ludwigiae, discovered that the above rusts upon Jussiaea 
agree exactly, so far as can at present be determined, with the Ludwigia 
rust. Furthermore, Spegazzini states that the Aecidium is found 
associated with the Puccinia stage upon Jussiaea, thus making the 
rust one with the same life cycle as Puccinia Ludwigiae. Also, ac- 
cording to Engler and Prantl, Jussiaea and Ludwigia are very closely 
related and similar plants. Aecidium Jussiaeae was described in 
Anal. Soc. Cienc. Argentina 9: 174. 1880; also in Saccardo, Syll. 
Fung. 7: 790. 1888, and distributed by Spegazzini as Dec. Myc. 
Argentinae 30. This specimen is in the herbarium here. Puccinia 
Jussiei was described in Anal. Soc. Cienc. Argentina 12: 68. 1881; 
then in Sacc. Syll. Fung. 7: 700. 1888. The hosts given are Jz^ma^a 
lanceolata and Jussiaea longifolia. No specimens of this Puccinia 
are at hand, but the description agrees almost exactly with that of 
Puccinia Ludwigiae. 
