Part 8, 1922] AECIDIACEAE 583 
ILLustRations: Beitr. Krypt. Schweiz 22: f. 216; Fl. Ital ; i 
Rust Fungi f. 82; Sydow, Monog. Ured. 1: A f. 9 11. pai iuat gaa 
Exsiccati: Barth. Fungi Columb. 2444, 3169; Barth. N. Am. Ured. 1036, 1145, 1233, 1434, 
1837, 2629; Brenckle, Fungi Dak. 318; Cl ts : 
183;'D. Grif. W. Am. Funai 3ode. ements, Crypt. Form. Colo. 555; Garrett, Fungi Utah. 
141. Micropuccinia conglomerata (Strauss) Arth. & Jackson; 
Arth. Bull. Torrey Club 48: 40. 1912. 
Uredo con glomerata Strauss, Ann. Wett. Ges. 2: 100. 1810. 
Puccinia conglomerata Schmidt & Kunze, Deuts. Schwimme 8: 4. 19/ . 1818. 
Puccinia Nardosmiae Ellis & Ev. Jour. Myc. 1: 85. 1885. 
Dicaeoma conglomeratum Kuntze, Rev. Gen. 33: 468. 1898. 
Dicaeoma Nardosmiae Kuntze, Rev. Gen. 33: 469. 1898. 
Dasyspora conglomerata Arth. Résult. Sci. Congr. Bot. Vienne 346. 1906. 
Puccinia Petasites Vesterg. Micr. Rar. Sel. 1389. 1909. 
O. Pycnia unknown, probably not formed. 
III. Telia hypophyllous, rarely epiphyllous, gregarious but distinct in circular or irregular 
groups 0.5—1 cm. across, often arranged concentrically, small, round, 0.2-0.5 mm. in diameter, 
early naked, at first punctate, becoming pulverulent, chestnut-brown, ruptured epidermis 
noticeable; teliospores ellipsoid or oblong, 14-18 by 20-35 uw, obtuse or narrowed at either 
end, not constricted at septum; wall cinnamon:brown, thin, 1 », with small, hyaline, hemi- 
spheric umbo over pore at apex, 2-4 4 high, smooth; pedicel colorless, short, deciduous. 
On CARDUACEAE: 
Petasites frigida (L,.) Fries, Alberta, British Columbia. 
Petasites palmata (Ait.) A. Gray, Michigan, Minnesota, New York ; Ontario. 
Type LocaLity: Mountains of Bavaria, Germany, on Tussilago alpina. 
DistRIBUTION: Northern New York to the mountains of British Columbia; also in Europe. 
ILLusrRations: Beitr. Krypt. Schweiz 2?: f. 140; Corda, Ic. Fung. 4: pl. 4, f. 47; Hedwigia 
30: pl. 36, f. 1; Krypt.-fl. Brand. Pilze 3: f. Bi24. 
Exsriccati: Barth. N. Am. Ured. 1564, 2627; Sydow, Ured. 2424. 
142. Micropuccinia expansa (Link) Arth. & Jackson; Arth. 
Bull. Torrey Club 48: 40. 1921. 
Puccinia expansa Link, in Willd. Sp. Pl. 62: 75. 1825. 
Dicaeoma expansum Kuntze, Rev. Gen. 33: 468. 1898. 
Dasyspora expansa Arth. Résult. Sci. Congr. Bot. Vienne 346. 1906. 
O. Pycnia unknown, probably not formed. 
III. Telia hypophyllous or occasionally epiphyllous, gregarious and more or less confluent 
in more or less circular groups 3-10 mm. across, on yellowish spots, small, round, 0.2-0.4 mm. 
in diameter, early naked, at first punctate becoming pulverulent, blackish-brown, ruptured 
epidermis noticeable; teliospores broadly ellipsoid, 18-26 by 30-38 u, rounded or obtuse 
above, rounded below, not or very slightly constricted at septum; wall chestnut-brown, 
1.5—2.5 » thick, covered with a hemispheric hyaline papilla at apex and over pore of lower 
cell at septum, 3-4 «4 high, smooth; pedicel colorless, short, deciduous. 
On CARDUACEAE: 
Senecio aronicoides DC., California. 
Senecio dispar A. Nelson, Utah. . : 
Type Locanity: Austria, on Cacalia alpina [A denostyles alpina]. . 
DisrrrBuTion: Mountains of Utah and northeastern California; also in Europe. 
ILLUSTRATIONS: Beitr. Krypt. Schweiz 2?: f. 141-144; Hedwigia 30: ‘pl. 26, f. 3. 
Exsiccatr: Garrett, Fungi Utah. 102. 
143. Micropuccinia Schistocarphae (Jackson & Holway) 
Arthur & Jackson. 
Puccinia Schistocarphae Jackson & Holway; Arth. Am. Jour. Bot. 5: 534. 1918. 
Leptopuccinia Schistocarphae Sydow, Ann. Myc. 20: 121. 1922. 
O. Pyenia unknown. 
III. Telia hypophyllous, confluent over areas 0.5-2 mm. across, early naked, compact, 
pulverulent, very light yellowish-brown becoming cinereous by germination, ruptured epider- 
mis inconspicuous; teliospores oblong or clavate, 16-22 by 39-55 4, rounded at apex, slightly 
