Part 4, 1920] AECIDIACEAE 311 
On Poacuas: 
Calamovilfa longifolia (Hook.) Hack. (Ammophila longifolia Benth.), Colorado, Illinois, 
Kansas, Michigan, Montana, Nebraska, North Dakota, Oklahoma, South Dakota, 
Wyoming; Manitoba, Ontario. 
Re TYPE LOCALITY: Chicago, Illinois, On ‘“‘Calamagrostis canadensis,’ error for Calamovilfa longi- 
‘olia. 
DistRiBuTION: Plains and prairies from the eastern shores of Lake Huron to Manitoba and 
Montana, and southward to Oklahoma. 
IuLusrrations: Bull. Lab. Nat. Hist. Univ. Iowa 5: pl. 3, f. 5la-c. 
EXSICCATI: Arth. & Holway, Ured. Exs. Ic. 51a—c; Barth. N. Am. Ured. 120, 923, 1217, 2135; 
Barth. Fungi Columb. 4349, 5050; Brenckle, Fungi Dak. 80; Ellis & Ev. Fungi Columb. 1567, 2159; 
D. Griff. W. Am. Fungi 98; Seym. & Earle, Econ. Fungi 88; Sydow, Ured. 910, 2306. 
53. Dicaeoma pygmaeum (Eriksson) Arthur & Fromme. 
Puccinia pygmaea Eriksson, Fungi. Paras. Scand. 449. 1895. 
Puccinia Milii Eriksson, Fungi Paras. Seand. 450. 1895. 
Dicaeoma Milii Arth. Résult. Sci. Congr. Bot. Vienne 344. 1906. 
O and I. Pyenia and aecia unknown. 
II. Uredinia chiefly epiphyllous, numerous, scattered or in elliptic groups on discolored 
spots, small, elliptic or oblong, 0.3-0.5 mm. long, soon naked, pale cinnamon-brown, ruptured 
epidermis not conspicuous; paraphyses numerous, intermixed, capitate, 13-21 4 broad above 
by 42-96 uw long or less, the wall variable in thickness, 1.5—4 yw, pale-yellow or colorless, smooth; 
urediniospores broadly ellipsoid or ellipsoid, 19-29 by 21-35 u; wall golden- or cinnamon-brown, 
thin, 1.5», finely and rather closely echinulate, the pores somewhat indistinct, usually 8, 
scattered. 
III. Telia hypophyllous, scattered, oblong or linear, 0.5-1.5 mm. in length, long covered 
by the epidermis, compact, dark-gray; teliospores clavate or cylindric, 12-21 by 29-51 yu, trun- 
cate above, narrowed below, slightly or not constricted at septum; wall chestnut-brown, thin, 
about 1 », slightly thickened above, 3-5 «; pedicel very short, dark chestnut-brown. 
On PoackeakE: 
Arctagrostis arundinacea (Trin.) Beal, Alaska. 
Calamagrostis aleutica Bong., Alaska, Oregon. 
Calamagrostis canadensis (Michx.) Beauv., Michigan, Wisconsin. 
Milium effusum L., Wisconsin. 
Oryzopsis asperifolia Michx., Wisconsin; Ontario. 
Tyre Locality: Borgholm, Sweden, on Calamagrostis epigeios. 
DISTRIBUTION: From southern Ontario to Wisconsin northward, and on the Pacific coast from 
Oregon to Bering Straits; also in Europe. : 
ILLUSTRATIONS: Krypt.-fl. Brand. Pilze 3: f. B191. 
54. Dicaeoma holcinum (Eriksson) Arthur & Fromme. 
Puccinia holcina Eriksson, Ann. Sci. Nat. VIII. 9: 274. 1899. 
O and I. Aecia and pycnia unknown. 
II. Uredinia amphigenous, scattered, elliptic or oblong-linear, small, 0.3-0.5 mm. long, 
early naked, cinnamon-brown, pulverulent, ruptured epidermis apparent; paraphyses none; 
urediniospores globoid, 19-24 by 23-27 w; wall thin, 1-1.5 u, yellowish or pale golden-brown, 
finely and closely echinulate, the pores 6-8, scattered, rather indistinct. 
III. Telia chiefly hypophyllous, especially abundant on the sheaths, scattered, seldom 
confluent, oblong, 0.5-1.5 » long, dark grayish-black, long covered by the epidermis, accom- 
panied by a dark hyphal stroma; teliospores cuneate or oblong-clavate, 18-29 by 35-64, 
truncate or rounded above, usually narrowed below, slightly or moderately constricted at 
septum; wall smooth, chestnut-brown, rather thin, about 1.5, darker and thicker above, 
4-7 4; pedicel short, deciduous, concolorous with base of spore. 
On POACEAE: 
Notholcus lanatus (L.) Nash (Holcus lanatus L,.), California, Massachusetts, New York, Ore- 
gon, Washington; British Columbia. 
TPE LOCALITY: Stockholm, Sweden, on Holcus lanatus. 
DisrriputTion: Naturalized along the Pacific coast from southern California to British Colum- 
bia and at Woods Hole, Massachusetts, and eastern end of Long Island, New York; alsoin northern 
Europe. 
Picea Barth. Fungi Columb. 3172, 3173, 4059, 4267, 4852, 5063; Barth. N. Am. Ured. 
41, 851, 1763, 1947. 
