﻿508 Ellis and Everhart: New Species of^ 



pedicels very short (10-12 u), fragile, hyaline : paraphyses linear- 

 lanceolate, hyaline. 



This must be very near Uromyccs Tanaccti Rabh., but that has 

 broader glabrous spores and no paraphyses. 



Puccinia similis E. & E. 



On leaves and stems of Artemisia tridentata, Sweetwater Co., 

 Wyoming, July, 1897 (Prof. Aven Xelson). 



I. Pseudoperidia amphigenous in small clusters on the leaves, 

 erumpent, closed at first, then open with erect pale margin, more 

 or less distinctly incise -toothed, sub-cylindrical, about .5 mm. high, 

 mostly a little narrowed at the base, deep orange below ; aecidio- 

 spores deep orange, subglobose, 1 5-20 tt in diameter, epispore thin, 

 nearly smooth. II. Uredospores in flat orbicular dark cinnamon- 

 colored naked sori about 1 mm. across, globose or ovate, chestnut- 

 brown, aculeolate (more distinctly so above), 18-22 ft in the longer 

 diameter. III. Teleutospores in sori like those of the uredospores, 

 but of a deeper color, nearly black, oblong-elliptical, 20-30 

 X 14-16 ft, slightly thickened above and sparingly echinulate- 

 roughened around the apex ; pedicels stout, hyaline, 80-100 fi long, 

 attenuated below. 



Differs from P. Tanaceti DC. in its larger, thinner, flatter, 

 darker-colored sori and in the presence of an Aecidinm. 



Ravenelia Mesilliaxa E. & Barthol. 

 On leaves of Cassia bauhiiiioides, near Mesilla, New Mexico, 

 Oct., 1897 (E. O. Wooton). Comm. E. Bartholomew. 



III. Teleutosori amphigenous, orbicular, .5-1 mm. in diam. 

 often crowded and subconfluent, becoming nearly black, surrounded 

 by the ruptured cuticle : heads hemispherical, the larger ones flat- 

 tened above, 45-85/; in diam., circumferential spores 12-20 in 

 number, 4-8 in a cross section, polygonal from mutual pressure, 

 12-15/1 broad: cystoid cells globose or ovate, hyaline or nearly 

 so, 12-15 P in diameter : stipe of 4-6 conglutinated threads, hyaline 

 or slightly colored, short (25-30//), deciduous. 



Differs from R. cassiaccola Atks. in its smaller, more numerous 

 spores and shorter deciduous stipe. 



Phoma fumosa E. & E. 



On dead limbs of Negundo aceroidcs, Fort Collins, Colo., 

 March, 1898 (Prof. C. S. Crandall, no. 314). 



