Part 5, 1920] AECIDIACEAE 359 
Carex. lanuginosa Michx., Colorado, Montana, Wyoming. 
Carex Lyngbyei Hornem. C. cryptocarpa C. Meyer), Washington. 
Carex nebraskensis Dewey (C. Jamesii Torr. not Schw.), Colorado, Montana, Nebraska, 
Oregon, Utah, Wyoming. 
Carex nigricans C. Meyer, Wyoming; Alberta. 
Carex nudata Boott, California. 
Carex obnupta L. H. Bailey (C. magnifica Dewey), Oregon, Washington. 
Carex Parryana Dewey, Wyoming. 
Carex Pseudocyperus L., Michigan. 
Carex retrorsa Schw., Wisconsin; British Columbia. 
Carex rostrata Stokes (c. urticulata Boott), Colorado, Idaho, Montana, Oregon, Utah, 
Washington, Wisconsin. 
Carex Sartwellit Dewey, Wisconsin. 
Carex stipata Muhl., Indiana. 
Carex ebay Lam., Connecticut, Delaware, Massachusetts, Michigan, New York, Penn- 
sylvania, 
Carex strictior Dewey, Michigan, New York, Wisconsin; Ontario. 
Carex substricta (Kiikenth.) Mackenzie, Montana, Wisconsin. 
Carex trichocarpa Muhl., Indiana, Michigan, Wisconsin. 
Carex triquetra Boott, California. 
Carex viridula Michx., Oregon, Pennsylvania. 
Carex sp., Illinois, Missouri, Virginia. 
TYPE LocaLitv: Island of Zealand, Denmark, on Urtica dioica. 
Disrrravurion: Across southern Canada and the northern United States from Massachusetts 
and Delaware to southeastern Alaska and central ee also in Europe, Sites and Japan. 
ILLUSTRATIONS: Beitr. Krypt. Schweiz 2?: f. 201; t.-fl, Brand, 3: f. B105. 
Exsiccati: Barth. Fungi Columb. 2351, 2655, 5170. PiF0, 3349, 3545, 3546. 3655, 3751, 3772, 
3837, 3838, 3863, 3864, 3973, 4066, 4166, 4356, 4377, 4575, 4676, 4978, 4979, 5057, 5079: Barth, N. 
Am. Ured. 740, 770, 940, 972, 1081, 1082, 1242, 1673, 1878, 1975, 2076, 2077, 2174, 2175: Brenckle, 
Fungi Dak. 12, 118, 294; Clements, Crypt. Form, Colo. 550, 551, 601; Ellis, N. Am. Fungi 266, 726; 
poeaane Fungi Columb. 1468, 1759; Garrett, Fungi Utah. 44, 45, 129, 130, 167, 172; D. Griff. W. 
Am, Fungi 339; Kellerm. Ohio Fungi 69, 70, 71, 192; Seym. & Earle, Econ. Fungi 388; Sydow, Ured. 
464, 1065 1575, 2115, 2513. 
130. Dicaeoma spatiosum (Kern) Arthur & Kern. 
Puccinia spatiosa Kern, Mycologia 9: 213. 1917. 
O and I. Pyenia and aecia unknown. 
II. Uredinia not seen; urediniospores intermixed with the teliospores, broadly ellipsoid, 
26-29 by 30-39 uw; wall light cinnamon-brown, 2-2.5 uw thick, sparsely and conspicuously echi- 
nulate, the pores 3, or sometimes 4, approximately equatorial. 
III. Telia hypophyllous, scattered, or in more or less evident longitudinal series, oval, 
oblong or linear, 0.5—1 mm. long, sometimes confluent end to end, rather early naked, blackish, 
ruptured epidermis conspicuous; teliospores narrowly obovoid, 24-29 by 45-64 u, considerably 
constricted at septum, rounded above, rounded or narrowed below; wall chestnut-brown, 
1.5-2 » thick, very much thicker above, 16-23 4, smooth; pedicel nearly colorless, once to 
once and a half length of spore. 
On CYPERACEAE: 
Carex sp., North Dakota, South Dakota. 
Type Locality: Brookings, South Dakota, on Cerex sp. 
DISTRIBUTION: Known only from the type locality and one station in North Dakota. 
131. Dicaeoma microsorum (Kérn.) Kuntze, Rev. Gen. 33: 469. 
1898. 
Puccinia microsora Koérn.; Fuckel, Fungi Rhen. 2637. 1874. 
O and I. Pycnia and aecia unknown. 
II. Uredinia of the typical sort amphigenous, scattered, oval or oblong, 0.5—1.5 mm. long, 
often large, bullate, long covered by the epidermis, surrounded by a rather thin, pale-brown 
stroma; urediniospores ellipsoid, 20-26 by 26-30 u; wall pale-yellow or nearly colorless, thin, 
about 1—1.5 u, strongly and sharply echinulate, the pores obscure, apparently 4, equatorial. 
Uredinia of the modified sort (amphisori) amphigenous, scattered, often arranged serially, 
roundish or elliptic, 0.3-0.6 mm. long, brownish, compact, long covered by the epidermis, 
surrounded by a moderately thick, light chestnut-brown stroma; urediniospores of the modi- 
fied sort (amphispores) broadly spatulate or obovoid, 20-28 by 32-51 yu, rounded above, usually 
attenuate below; wall chestnut-brown, 2-3 » thick, slightly thicker above, 3-5 u, sparsely and 
inconspicuously verrucose, the pores 2, occasionally 3, equatorial; pedicel persistent, colorless, 
about length of spore. 
