550 NORTH AMERICAN FLORA [VoLuME 7 
64. Micropuccinia Epilobii (DC.) Rostr. Medd. Gr¢nland 
30: 114. 1904. 
Puccinia Epilobii DC. Fl. Fr. 6:61. 1815. 
Dicaeoma Epilobit Kuntze, Rev. Gen. 33: 468. 1898. 
Dasyspora Epilobii Arth. Résult. Sci. Congr. Bot. Vienne 346. 1906. 
O. Pycnia unknown. 
III. Telia hypophyllous, scattered over the entire lower surface of leaf, arising from 
a diffused mycelium, ellipsoid or oblong, 0.5-1 mm. long, early naked, pulverulent, cinnamon- 
brown, ruptured epidermis evident; teliospores ellipsoid or oblong, 18-23 by 30-42 u, rounded 
at both ends, deeply constricted at septum; wall yellowish-brown, rather thick, 1.5-2.5 yn, 
sometimes up to 3 over pores, minutely and closely verrucose; pedicel colorless or pale- 
yellow, fragile, up to 25 u long; mesospores few, ellipsoid, 20-23 by 24-35 mu. 
This species is correlated with Nigredo plumbaria (Peck) Arth. and Dicaeoma Epilobin- 
tetragont (DC.) Arth., both autoecious species, there being close similarity in the morphological 
characters of the telia in the three species, and a significant correspondence in the hosts. 
This agreement doubtless indicates a common origin for the three species. 
ON ONAGRACEAE: 
Epilobium alpinum L., Wyoming; Quebec. 
Epilobium Hornemannii Reichenb. (E. alsinifolium Blytt), Greenland. 
TYPE LocaLIty: In vicinity of Quériqut, Pyrenees, France, on Epilobium oviganifolium. 
DiIstRIBUTION: Mountains of northwestern Wyoming, and from the mouth of the St. Lawrence 
River to western Greenland; also in Europe. 
InLusrrations: Beitr. Krypt. Schweiz 2?: f. 120; Holway, N. Am. Ured. 1: pl. 33, f. 110a, 6; 
Krypt.-fl. Brand. Pilze 3: f. B19; Grove, Brit. Rust Fungi f. 148. 
65. Micropuccinia scandica (Johans.) Arth. & Jackson; Arth. 
Bull. Torrey Club 48: 41. 1921. 
Puccinia scandica Johans. Bot. Notiser 1886: 175. 1886. 
Dicaeoma scandicum Kuntze, Rev. Gen. 33: 470. 1898. 
Dasyspore scandica Arth. Résult. Sci. Congr. Bot. Vienne 347. 1906. 
O. Pycnia unknown. 
III. Telia hypophylious, covering the leaf, crowded, round, 0.3-0.8 mm. in diameter, 
early naked, pulverulent, somewhat pulvinate, dark cinnamon-brown, ruptured epidermis 
evident; teliospores oblong or clavate, 13-17 by 27-38 wu, rounded above, rounded or narrowed 
below, moderately or deeply constricted at septum; wall cinnamon-brown, 1-2 y» thick, thick- 
ened into a lighter umbo at apex, 3-5 4, closely and finely verrucose; pedicel colorless, fragile, 
up to 40 uw long. 
ON ONAGRACEAE: 
Epilobium clavatum Trel., Utah, Washington. 
Epilobium sp., British Columbia. 
TvPE Locatity: Jemtland, Sweden, on Epilobium anagallidifolium. 
DistrRipution: From central Utah northwestward into Canada; also in Sweden. 
ILLUSTRATION: Holway, N. Am. Ured. 1: pl. 33, f. 111. 
Exsiccati: Garrett, Fungi Utah. 84, 140; Sydow, Ured. 1940, 2038. 
66. Micropuccinia Araliae (Ellis & Ev.) Arthur & Jackson. 
Puccinia Araliae Ellis & Ev. Jour. Myc. 6:120. 1891. 
Dicaeoma Araliae Kuntze, Rev. Gen. 33: 467. 1898. 
O. Pycnia unknown. 
III. Telia mostly hypophyllous, crowded on somewhat hypertrophied spots 1-3 mm. 
in diameter, round or oblong, 0.3-0.5 mm. across, soon naked, slightly pulverulent, light 
chocolate-brown, ruptured epidermis conspicuous; teliospores oblong, 16-23 by 30-38 u, 
rounded or obtuse at both ends, not or slightly constricted at septum; wall dark cinnamon- 
brown, thin, 1-1.5 », smooth except for a few irregular lines of verrucose markings; pedicel 
colorless, fragile, about as long as spore. 
