Arthur and Holway: ViOLET RUSTS OF NORTH AMERICA. 639 
20-25 by 35-40 v for the teleutospores. The name has been 
very little used by American or other botanists. The assign- 
ment of the name to a place under the wholly distinct Puccznza 
Fergussont, as done by De Toni in the seventh volume of 
Saccardo’s Sylloge fungorum, was far from being a shrewd 
guess as to its relationship. It is even more inexplicable how 
Dietel could have fancied a resemblance to Puccinia Fergussont 
in the type material of his Puccznza densa. Wis material of the 
latter species was collected in 1895 by W. N. Suksdorf in the 
State of Washington. It was on Vrola glabella, and yielded 
only teleutospores. The characters which he drew up for the 
proposed new species agree perfectly with those of large-spored 
forms of Puccinza Viole. Beside the type collection we have 
examined material on the same host from other localities in the 
same State, and secured by the same collector. This ample 
material includes all three spore stages, and leaves no doubt of 
the identity of P. densa Diet. with P. Viole. 
All the hosts of the specimens cited under Vrola Montanenszs, 
and part of those under V. adunca, have been determined or 
verified by Dr. P. A. Rydberg of the New York Botanical Garden. 
An error in the thirteenth volume of Saccardo’s Sylloge fun- 
gorum, page 1313, should be pointed out here. Pucc7nza 
Marie-Wilsont Clint. is said to occur on Vrola cucullata Ait. 
and V. delphintfolia Nutt. The error is due to a confusion of 
names. <&cidium Marie-Wilsoni Peck is found on these 
hosts but Puccznza Marie-Wilsont Clinton is only found on 
Claytonza, and both species are widely different from Puccznza 
Viole. 
Puccinia effusa D. & H. 1895. Erythea 3: 81. 
I. “Ecidia amphigenous, but chiefly hypophyllous, in large indefi- 
nite clusters, often covering much of the leaf, noticeably extending 
along the veins and petioles; substratum somewhat thickened; cups 
broad and low, border white, irregularly and coarsely lacerate, some- 
what recurved; spores subglobose, somewhat angular from compres- 
sion, minutely verrucose, 20-27 » in diameter. 
III. Teleutosori for the most part arising from the cups of the 
ecidia, uncovered, élliptical, nearly black; spores dark brown, ellip- 
tical or oblong, slightly if at all constricted at the septum, inconspicu- 
ously verrucose, 23-31 »% broad by 37-50 long; wall moderately 
thick; apex rounded, usually not thickened; base rounded or occa- 
sionally slightly narrowed; pedicel hyaline, deciduous. 
