120 ARTHUR: NEW SPECIES OF UREDINEAE 
lapping, the wall 3 » thick; aeciospores ellipsoid, 16-23 by 24-26 yp; 
wall 1-1.5 » thick, closely verrucose 
IJ. Uredinia hypophyllous, scattered, roundish, small, 0.2—-0.4 
mm. across, moderately pulverulent, cinnamon-brown ; uredinio- 
spores globoid, ellipsoid or obovoid, 20-26 by 24-29 ; wall cin- 
namon-brown, 1.5-2 u thick, prominently echinulate, the pores 2, 
surrounded by an indistinct smooth area, equatorial. 
Ill. Telia hypophyllous or somewhat amphigenous, scattered, 
roundish, small, 0.1-0.4 mm. across, early naked, compact, 
chestnut-brown; teliospores ellipsoid or obovate, often somewhat 
irregular, 19-26 by 32-45, obtuse or rounded above, more or 
less narrowed below, slightly constricted at septum; wall cinna- 
mon-brown, laminate, thin, 1.5-2.5 » thick, much thicker above, 
7-10 uw, with distinct and somewhat paler umbo; pedicel colorless, 
once to once and a half length of spore, usually breaking away. 
On Verbesina montanoifolia Robs. & Greenm., Patzcuaro, 
Mexico, October 16, 1898, ii, III, 3000 (Barth. Fungi Columb. 
5055); Morelia, Mexico, October 8, 1899, ii, III, 3592 (Barth. 
N. Am. Ured. 426); Patzcuaro, Mexico, October 10, 1899, O, I, I, 
III, 3606-7 (type), all collections by E. W. D. Holway. The 
species differs from P. abrupta Diet. & Holw., which occurs on 
the same and other species of Verbesina, by the strongly obovate 
teliospores with somewhat narrowed base, paler and thinner walls, 
and more fragile pedicel. The Verbesina rusts have recently been 
studied by Professor H. S. Jackson, who has separated this form 
as a new species and supplied the name and diagnosis. 
Uromyces Shearianus nom. nov. 
Aecidium Atriplicis Shear, Bull. Torrey Club 29: 453. 1902. 
Uromyces Atriplicis Arth. Bull. Torrey Club 45: 141. 1918. 
Not U. Atriplicis McAlpine, 1906. 
In the preceding number of this series the writer transferred 
the early specific name of this rust to another genus without 
noticing that it had already been used in that connection for a 
wholly unlike rust occurring in Australia. Although regretting 
the unnecessary synonym I am pleased to have the opportunity 
to dedicate the species to Dr. C. L. Shear, who first described it, 
and who has done notable service in many ways in the field of 
mycology. 
