164 
Journal of Mycology 
[Vol. 10 
o. I. On Ribes floridum L.Her., II. III. on Carex riparia 
Curt. The species described above were collected at Decorah, 
la., by the writer. The aecidium on Ribes floridum was first ob¬ 
served in 1901. In 1902 a tuft of the Carex covered with the 
Puccinia was tied onto a clump of the Ribes which had never 
been attacked by any aecidium, and on June 16 many specimens 
of the aecidium were collected. On May 6, 1903, teletospores 
were sown in the greenhouse on Ribes floridum and aecidia were 
mature May 22; a second sowing was made May 15 ; spermogonia 
appeared May 23 and aecidia May 30. Sowings made the same 
days on Urtica and Ribes gracile were without result. 
This aecidium is very distinct from any other Ribes aecidium, 
having white spores as well as white peridia; the spermogonia are 
very few. Puccinia albiperidia has small, round, brown teleu- 
tosori, not surrounded by the epidermis, while those of P. rip- 
aria are oblong, black, and with the ruptured epidermis very 
noticable. Good uredospores of the former have not been col¬ 
lected ; Dr. Aruthur describes them as small. These two species 
appear to be quite distinct from European species, which all 
have teleutospores of the Puccinia Urticae-Caricis type, with 
much larger and darker teleutospores, the smallest measurements 
given by Klebahn being 37-56 x 15-21/A. 
PUCCINIA MODICA Holway n. sp. 
Sori amphigenous, round or elongated, -J-i mm.; uredosori 
brown; uredospores globose, closely and evenly tuberculate, yel¬ 
lowish-brown, 20-24/A, germ-pores 4-5, scattered; teleutosori 
black, pulverulent; teleutospores broadly elliptical, brown, smooth, 
36-40 x 24-32/*, wall thick, up to 4 /a, apex rounded, 4-8/A thick, 
pedicel persistent, hyaline, up to 120/A long; one-celled teleutos¬ 
pores occur. 
Mexico ; on Arenaria sp.; Etla, Oaxaca, No. 5401 (type); 
Oaxaca, No. 5415; on Arenaria peyritshii; Cuernavaca No. 5271 ; 
all collected by the writer in 1903; on Arenaria sp., Tumbala, 
Chiapas, No. 3343, E. W. Nelson, 1895; near Salazar, No. 7039 
and on Arenaria reptans, No. 7038, both by Rose and Painter 
in 1903. 
PUCCINIA ECHINOPTERIDIS Holway n. sp. 
II. Uredosori brown, amphigenous, mostly on the under 
side of the leaves and on the stems, circinate in small groups, 
globose to oblong, or irregular and confluent; spots pale yellow; 
uredospores light brown, globose to ovate, 26-33 x 22-26/A coarse¬ 
ly echinulate. 
III. Teleutosori amphigenous, black, pulverulent, small, be¬ 
coming confluent; teleutospores globose to broadly elliptical, not 
constricted, wall nearly uniform in thickness, sometimes slightly 
