390 NORTH AMERICAN FLORA [VoLUME 7 
179, Dicaeoma areéolatum (Dietel & Holway) Kuntze, 
Rev. Gen. 33: 467. 1898. 
Puccinia areolata Dietel & Holway; Dietel, Bot. Gaz. 19: 304. 1894. 
Allodus areolata Arth. Résult. Sci. Congr. Bot. Vienne 345. 1906. 
OQ. Pycnia amphigenous, in small groups, minute, punctiform, inconspicuous, globoid, 
110-125 w in diameter by 80-100 uw high, honey-yellow; ostiolar filaments very short. 
I. Aecia hypophyllous, in rather loose circular or oval groups on yellowish spots, some- 
times annular, 1-4 mm. across, short-cylindric; peridium white, the margin slightly recurved, 
erose; peridial cells isodiametric or rhombic in longitudinal section, the outer wall 7-8 u thick, 
striate, the inner wall 5-7 u thick, verrucose-striate; aeciospores globoid, 18-24 by 21-26 yu; 
wall colorless, about 1 » thick, very minutely verrucose. 
II. Uredinia hypophyllous, single or in small groups scattered on yellowish spots, roundish, 
small, 0.25-0.3 mm. across, pulvinate, not often naked, opening by apical rupture, slightly pul- 
verulent, cinnamon-brown; urediniospores globoid or obovoid, 20-25 by 25-32 y; wali cinna- 
mon-brown, 1.5-2 » thick, rather finely and closely echinulate, the pores 2, superequatorial. 
III. Telia hypophyllous, gregarious, on orbicular pale spots, small, circular, 0.2-0.5 mm. 
across, often in annular groups 3-5 mm. across, early naked, chocolate-brown, pulverulent, 
ruptured epidermis noticeable; teliospores oblong or clavate, rarely elliptic, 20-34 by 45-80 u, 
often obtuse at both ends, slightly constricted at septum; wall chestnut-brown, 1.5-2 u thick, 
smooth or minutely rugose, the pores covered with a pale umbo making the wall 7~—9 » thick; 
pedicel colorless, fragile, rarely as long as spore. 
On RANUNCULACEAE: 
Caltha biflora DC., California, Washington. 
Caltha leptosepala DC., Colorado; British Columbia, Saskatchewan. 
TYPE LocaALity: Skamania County, Washington, on Caltha biflora. 
Distr1BuTion: From southern British Columbia and central Saskatchewan to central California 
and Colorado. 
ILLUSTRATIONS: Holway, N. Am. Ured. 1: pl. 1, f. 4. 
Exsiccati: Barth. N. Am. Ured. 1523. 
180. Dicaeoma calthaecola (Schroet.) Arth. Résult. 
Sci. Congr. Bot. Vienne 344. 1906. 
Puccinia calthaecola Schroet. Beitr. Biol. Pl. 3:61. 1879. 
Puccinia Zopfii Wint. Hedwigia 19: 39. 1880. 
Dicaeoma Zopfii Kuntze, Rev. Gen. 32: 471. 1898. 
O. Pycnia amphigenous, few, gregarious in small groups in the center of the groups of 
aecia. 
I. Aecia hypophyllous, gregarious in closely clustered annular or orbicular groups on 
yellow spots, short-cylindric; peridium whitish, the margin recurved, lacerate; peridial cells 
rhombic, somewhat overlapping, the outer wall rather thick, 7-8 u, transversely striate, the 
inner wall thinner, 2-4 4, strongly verrucose; aeciospores globoid or ellipsoid, 16-24 by 20- 
28 »; wall thin, finely and closely verrucose. 
Il. Uredinia amphigenous, chiefly hypophyllous, scattered, roundish, small, 0.1-0.5 mm. 
in diameter, early naked, pulverulent, cinnamon-brown, ruptured epidermis inconspicuous; 
urediniospores ellipsoid or obovoid, 20-27 by 24-334; wall golden- or cinnamon-brown, 
1.5-2 » thick, moderately echinulate, the pores 2 or usually 3, equatorial or slightly super- 
equatorial. 
III. Telia amphigenous, or only hypophyllous, scattered, roundish, small, 0.1-0.5 mm. in 
diameter, early naked, pulverulent, chocolate-brown, ruptured epidermis not noticeable; 
teliospores ellipsoid or oblong, 23-30 by 37-51 pu, rounded or obtuse above, rounded or narrowed 
below, slightly or not constricted at septum; wall chestnut-brown, 2-2.5 » thick, sometimes 
thickened at apex into a lighter-colored papilla over the pore, 3-7 », inconspicuously but 
rather coarsely verrucose, appearing smooth when wet; pedicel colorless, fragile, short. 
On RANUNCULACEAE: 
Caltha leptosepala DC., Colorado. . : . 
Caltha palustris L., Iowa, Michigan, Minnesota, Wisconsin; Manitoba. 
Typr Locality: Black Forest, Germany, on Caltha [palustris?]. 
Distrreution: The region of lakes from southern Michigan to Iowa and western Manitoba; also 
in Europe. 
i anon: Beitr. Krypt. Schweiz 22: f. 70; Holway, N. Am. Ured. 1: gl. 1, f. 2. 
Exsiccati: Barth. N. Am. Ured. 1533. 
