8 ARTHUR: NEW SPECIES OF UREDINEAE 
I. Aecidia amphigenous, in restricted circular groups, pustular, 
constricted by the tissues of the substratum; peridia delicate, 
evanescent ; aecidiospores globoid, 16-23 by 22-29; wall thick, 
34, golden-yellow, closely and finely verrucose. 
On Solidago mollis Bartl., Callaway, Nebraska, June 7, 1902 
(type), /. IZ Bates ; Cypress Hills, Assiniboia, /. Wacoun. The- 
second collection is in the Ellis Herbarium at the New York Botan- 
ical Garden, and is erroneously labeled “ Aecidium of Puccima 
Columbiensis EF. & E. on Oenothera biennis.’ It is referred to by | 
Mr. Holway in Jour. Myc. 8: 171, December, 1902. A part of | 
the same collection is in the National Herbarium at Washington. — 
The species is readily told from the common Aecidium on Solt- 
dago by the evanescent peridium, and by the larger spores, having : 
thick, golden-yellow walls. 
PURDUE UNIVERSITY. 
