Part 5, 1920] AECIDIACEAE 393 
J. Aecia chiefly hypophyllous, sometimes caulicolous or petiolicolous, loosely gregarious, 
often on larger, slightly discolored spots, sometimes causing thickening of substratum, especi- 
ally on the veins, cupulate, 0.2—0.4 mm. in diameter; peridium whitish, the margin recurved, 
lacerate; peridial cells rhombic, 15-26 by 20-35 u, slightly overlapping, the outer wall 5-9 u 
thick, transversely striate, the inner wall thinner, 3-4 4, verrtcose; aeciospores globoid, angular 
or oblong, 14-19 by 16-26 u; wall pale or colorless, thin, 1-1.5 u, faintly verrucose. 
II. Uredinia chiefly hypophylious, numerous, at first in small groups on discolored spots, 
later scattered, sometimes confluent, roundish or punctate, small, 0.2-0.5 by 0.2-0.6 mm., 
early naked, pulverulent, cinnamon-brown, ruptured epidermis conspicuous; urediniospores 
globoid, obovoid, or ellipsoid, 18—25 by 21-32 4; wall golden- or cinnamon-brown, variable in 
thickness, 1.5-3 wu, occasionally 3.5 u, moderately echinulate, the pores 2, rarely 3, equatorial. 
III. Telia amphigenous or petiolicolous, many, scattered or sometimes confluent, round- 
ish, irregular or oblong, 0.2-0.7 by 0.2-1 mm., rather early naked, pulverulent, chocolate- 
brown, ruptured epidermis conspicuous; teliospores ellipsoid, sometimes pyriform, 17-26 by 
27-41 » (western forms 17-28 by 27-45 yw), rounded or narrowed at the ends, slightly or not 
constricted at septum; wall cinnamon- or chestnut-brown, moderately thick, 1.5-2.5 y, in 
some collections 2-3 », thickened above into a lighter-colored, broad umbo over the apical 
pore, 3~7 , faintly or distinctly verrucose, especially on the upper cell (western forms often 
more noticeably verrucose); pedicel hyaline, fragile, short. 
This cosmopolitan species shows some variation throughout North America, none, how- 
ever, of specific value or constancy. 
ON VIOLACEAE: 
Viola adunca J. E. Smith (V. avenaria Am. auth.), California, Colorado, Montana, Nevada, 
North Dakota, Oregon, Utah, Washington. 
Viola adunca glabra Brainerd, Colorado. 
Viola adunca longipes Rydb., California, Montana, Utah, Wyoming. 
Viola afinis LeConte, Delaware, New York. 
Viola arenaria DC., New Hampshire, North Dakota. 
Viola blanda Willd., Kentucky, New York, West Virginia. 
Viola Brittoniana Pollard, New Jersey. 
Viola canadensis I,., Colorado, Kentucky, Michigan, Montana, New Mexico, New York, 
Oregon, South Dakota, Utah. 
Viola conspersa Reichenb. (V. Muhlenbergii Torr.), Massachusetts, New York, Wisconsin; 
uebec. 
Viola cucullata Ait., Nebraska, New Jersey, New York, North Carolina, Pennsylvania, 
Vermont, Virginia. 
Viola cucullata prionosepala (Greene) Brainerd, Maine, New York. 
Viola cucullata X sororia, New York. 
Viola eriocarpa Schw., Illinois, Indiana, Iowa, Maine, Michigan, Missouri, New Hampshire, 
New York, Ohio; Ontario. 
Viola fimbriatula J. E. Smith (V. ovata Nutt.), Maine, Massachusetts. 
Viola glabella Nutt., California, Idaho, Oregon, Washington. 
Viola Grahami Benth., Hidalgo, Mexico (state). 
Viola hastata Michx., North Carolina, Ohio, West Virginia. 
Viola hirsutula Brainerd, West Virginia. 
Viola hirsutula X papilionacea Brainerd, New York. . 
Viola incognita Brainerd, Maine, Michigan, Minnesota, New Hampshire, New York. 
Viola incognita Forbesii Brainerd, Connecticut, Maine, New York, Ohio. 
Viola lanceolata L,., Delaware, Maine, Michigan, New York. 
Viola missouriensis Greene, Indiana, Missouri. ; 
Viola montanensis Rydb., Colorado, Montana, Washington. 
Viola monticola Rydb., Montana. 
Viola Nannei Polak., Costa Rica; Guatemala. : : . . 
Viola nephrophylla Greene (V. cognate Greene), California, New Mexico, Oregon, Washing- 
ton. 
Viola ocellata 'T. & G., California. 
Viole Painteri Rose & House, Hidalgo. 
Viola pallens (Banks) Brainerd, New York. 
Viola palustris L., Alaska, Washington. . 
Viola papilionacea Pursh, Alabama, Illinois, Indiana, Iowa, Kansas, | Massachusetts, 
Missouri, New York, North Dakota, Oklahoma, South Dakota, Virginia, Wisconsin. 
Viola pedatifida G. Don, Colorado, New Mexico. 
Viola pratincola Greene, Missouri. | : oe See 
Viola primulifolia L., Alabama, Florida, Maine, Mississippi, New York, Virginia. ; 
Viola pubescens Ait., Indiana, Iowa, Michigan, New York, Vermont, Wisconsin; Ontario. 
Viola renifolia A. Gray, Maine, Michigan, Minnesota, Wisconsin. 
Viola rentfolia niphaige te Cen) Fernald, New York. 
10: trata Pursh, New York. 
Viole pirulose Greene (V. Rydbergii Greene), Colorado, Montana, North Dakota, Oregon, 
Wyoming. 
