150 ARTHUR: NEW SPECIES OF UREDINEAE 
On Argemone intermedia Sweet, Burkburnett, Texas, May 29, 
1917, B. O. Dodge. The collection shows a remarkably heavy 
infection, the leaves being wholly covered with groups of aecia on 
the lower side, with scarcely an aecium showing above. The 
groups rarely become confluent and indistinguishable, although 
often somewhat intermingling. The general appearance of the 
rust is that of a heteroecious form, and is not unlike that on 
Agoseris, Lactuca and Crepis, belonging to the Carex species, 
Puccinia patruelis. No aecia have heretofore been reported on 
any papaveraceous host, and no safe prediction can be made re- 
garding its relationship. 
Aecidium Thenardiae sp. nov. 
I. Aecia hypophyllous, in circular groups 8-10 mm. across, 
often circinating, on somewhat larger, yellowish spots, short 
cylindric; peridium white, the margin erect, erose, or torn; peridial 
cells in face view oblong, 16-22 by 24-30 », somewhat eee 
moderately verrucose; aeciospores quadrately globoid, 14-16 p 
diameter; wall volatiles: thin, I-I.5y in diameter, Selseghat 
thicker above, 2-5 u, finely and closely verrucose. 
On Thenardia Galeottiana Baill., near Oaxaca, Mexico, August 
20, 1894, C. G. Pringle, communicated by E. W. D. Holway. 
The form is undoubtedly heteroecious. 
Aecidium Cyrillae sp. nov. 
I. Aecia hypophyllous, in peg of 2-8, rarely more, on 
reddish-brown spots, 2-4 mm. across, short-cylindric, white; 
peridium erect, erose; peridial cells quadrangular i in radial section, 
with a strongly overlapping projection, the outer wall A, a 
smooth, the inner wall 7-9 thick, verrucose; aeciospores irregu- 
larly ellipsoid or globoid, 19-23 by 23-26 nu; wall pene ates thin, 
I-I.5u, greatly thickened above, 7-9 y, closely and finely verrucose. 
On Cyrilla racemiflora L., Ocean Springs, Mississippi, June 15, 
1896, Underwood & Earle. A sparse amount of the rust was 
found on the same host in the phanerogamic herbarium of the 
New York Botanical Garden, collected at New Orleans, Louisiana, 
1832, Drummond 202. A well-marked species, which is probably 
heteroecious. 
