478 BOTANICAL GAZETTE [MAY 
smooth, thin, less than 1 thick; pedicel colorless, thick, about 
as long as spore. 
On Oxalidaceae: Oxalis violacea from New Mexico as follows: Albu- 
querque, by Long, July 1917 (no. 6282), material obtained by inoculating with 
aeciospores from Berberis repens June 20, 1917; Tejano Experiment Station, 
by Long and Seay, July and September 1916 (nos. 6014, 6100, 6102). Also 
reported on following hosts: from Jamaica, Oxalis martiana; from Mexico, 
Oxalis divaricata, O. latifolia, O. tetraneuris, O. trinervis, O. vallicola, Oxalis sp.; 
from Texas, O. violacea; from Brazil, O. neuwiedii. 
The roestelia-like aecia and other characters of this rust indicate 
its relationship in a general way to the genus Gymnosporangium, 
while some of its characters show affinity for the genus Eriospo- 
rangium, from which, however, its very tough, persistent peridium 
would exclude it. It does not belong to the genus Argomyces, where 
ARTHUR has provisionally placed it. If one were following 
ARTHUR’S nomenclature, the rust would probably belong to a new 
genus, but the writers prefer to leave it under the old genus Puccinia 
for the present. 
OFFICE OF INVESTIGATIONS IN 
Forest PATHOoLoGy, BUREAU OF PLANT INDUSTRY 
BUQUERQUE, N. 
