Parr 5, 1920] AECIDIACEAE 369 
Uredinia of the modified sort (amphisori) hypophyllous, scattered, roundish, oval, or 
oblong, 0.3-0.8 mm. long, early naked, pulvinate, chestnut-brown, ruptured epidermis not 
conspicuous; urediniospores of the modified sort (amphispores) globoid, obovoid, or ellipsoid, 
17-24 by 21-31 »; wall dark cinnamon-brown, uniform, 1.5-2.5 4 thick, finely verrucose, the 
pores 2, opposite, slightly below the equator; pedicel colorless, semi-persistent, once to twice 
length of spore. 
III. Telia hypophyllous, scattered, oval, or oblong, 0.4-1 mm. long, early naked, pul- 
vinate, blackish-brown, ruptured epidermis noticeable; teliospores clavate-oblong, 16-21 
by 32-56 yu, usually rounded above, narrowed or rounded below, slightly constricted at septum; 
wail light chestnut-brown, 1-1.5 » thick, much thicker above, 5-10 u, smooth; pedicel nearly 
colorless, length of spore or less. 
On CYPERACEAE: 
Carex stricta L. (?), Connecticut, Delaware, Massachusetts, New York. 
TYPE Locality: Center (now called Karner), New York, on Carex stricta. 
DISTRIBUTION: Massachusetts and adjacent part of New York south to Delaware. 
ExsiccaTi: Barth. N. Am. Ured. 1033; Thiim. Myc. Univ. 746. 
140. Dicaeoma Trientalis (Tranz.) Arthur & Kern. 
Aecidium Trientalis Tranz.; Gobi & Tranz. Scripta Bot. Hort. Imp. Petrop. 3: 116. 1891. 
Puccinia karelica Tranz. Trav. Mus. Bot. Acad. Sci. St.-Pétersb. 2:16. 1905. 
O. Pyenia not seen, probably rarely formed. 
I, Aecia hypophyllous, gregarious, in irregular groups 1-4 mm. across, cupulate, about 
0.2 mm. in diameter; peridium delicate, recurved and lacerate at margin; peridial cells rhom- 
boidal, 24-32 » long, somewhat overlapping, the outer wall rather thick, 5-8 y, striate, the inner 
wall thinner, 3-4 4, verrucose; aeciospores angularly globoid, 13-16 by 15-21 yw; wall colorless, 
thin, 1-1.5 y, finely verrucose. 
On PRIMULACEAE: . 
Trientalis americana Pursh, New York; Nova Scotia. 
Trientalis arctica Fisch., Alaska. 
II. Uredinia chiefly hypophyllous, scattered, oval or elliptic, 0.3-0.6 mm. long, rather 
early naked, somewhat pulverulent, cinnamon-brown, ruptured epidermis conspicuous; 
urediniospores globoid or broadly ellipsoid, 16-19 by 20-24 4; wall cinnamon-brown, 2-2.5 u 
thick, finely and moderately echinulate, the pores 3~5, scattered. 
III. Telia chiefly hypophyllous, scattered, oval, oblong or linear, 0.4-1.5 mm. or more 
long, early naked, pulvinate, blackish, ruptured epidermis conspicuous; teliospores clavate- 
oblong, 13-21 by 26-48 », usually rounded above, rounded or narrowed below, slightly con- 
stricted at septum; wall chestnut-brown, J-1.5 4» thick, much thicker above, 7~12 4, smooth; 
pedicel tinted, about one half length of spore. 
On CYPERACEAE: 
Carex canescens L,., New York, Vermont. 
Carex diandra Schkuhr, New York. 
Carex paupercula Michx. (C. paupercula irrigua Fernald, C. magellanica Am. Auct.), 
Maine, New York, Wisconsin; Nova Scotia. 
Carex strictior Dewey, ‘Michigan. . 
TYPE LOCALITY: Lewaschewo, St. Petersburg, Russia, on Trientalis europaea, 
DistRIBUTION: Boreal habitats from Nova Scotia to northern New York and Wisconsin, and in 
southeastern Alaska; also in northern Europe. 
141. Dicaeoma (?) Pitcairniae (Lagerh.) Arthur. 
Puccinia Pitcairnice Lagerh.; Pat. & Lagerh. Bull. Soc. Myc. Fr. 11: 214. 1895. 
O and I. Pyenia and aecia unknown. ; 
II. Uredinia hypophyllous, scattered, oblong or linear, 0.2-0.7 mm. long, rather early 
naked, pulverulent, light cinnamon-brown, ruptured epidermis conspicuous; urediniospores 
broadly ellipsoid or broadly obovoid, 21-27 by 26-32»; wall pale-yellow or golden-brown, 
thick, 2.5-5 u, often showing two layers, the inner colored, the outer thin and colorless, coarsely 
and moderately echinulate, the pores 2, equatorial. 
III. Telia hypophyllous, scattered, oval or oblong, 0.3-1 mm. long, rather early naked, 
pulvinate, chocolate-brown, ruptured epidermis conspicuous; teliospores oblong, broadly 
ellipsoid or broadly obovoid, 19-27 by 37-53 y, rounded at both ends or slightly narrowed 
