Part 7, 1922] AECIDIACEAE 535 
teliospores oblong, 18-20 by 40-50 wu, rounded or obtuse above, rounded or narrowed below, 
strongly constricted at septum; wall chestnut-brown, 3-3.5 « thick, thickened by colorless 
papilla to 8» at apex, smooth; pedicel colorless, fragile, once to once and a half length of 
spore. 
ON SAXIFRAGACEAE: 
Ocrearia nudicaulis (D. Don) Small (Saxifraga nudicaulis D. Don), Alaska. 
; & LOCALITY: St. Lawrence Island, Bering Sea, on “Saxifr t i Hd 
interpreted as S. nudicaulis. . eta AEESE ence ce 
DIsTRIBUTION: Known only from the type locality. 
ILLUSTRATION: Holway, N. Am. Ured. 1: pl. 18, f. 70a, b. 
30. Micropuccinia pallido-maculata (Ellis & Ev.) Arthur & Jackson. 
Puccinia pallido-maculate, Ellis & Ev.; Holway, N. Am. Ured. 1: 49. 1906. 
O. Pycnia unknown. 
III. Telia amphigenous, small, round, 0.5-0.8 mm. across, gregarious and confluent, 
often circinate on pale-yellowish spots 1-3 mm. across, early naked, chestnut-brown, pul- 
verulent, ruptured epidermis conspicuous; teliospores somewhat irregularly fusiform, or more 
rarely ellipsoid or oblong, 13-16 by 26-38 », obtuse above and below, not constricted at sep- 
tum; wall 1.5~2 » thick, the apex and the pore of lower cell at septum covered by an abrupt 
hyaline papilla, 3-4 » thick, smooth: pedicel colorless, short, deciduous. 
ON SAXIFRAGACEAE: 
Micranthes arguta (D. Don) Small (Saxifraga arguta D. Don, S. punctata Am. Auth.), 
Colorado, Idaho, Montana, Utah. 
Micranthes Lyallit (Engler) Small (Saxifraga Lyallii Engler), Alberta. 
E LOCALITY: Sangre de Christo Range, Colorado, on Saxifraga punctata. 
DistrisuTion: Mountains of Colorado and Utah northward to Alberta. 
In.ustration: Holway, N. Am. Ured. 1: pl. 19, f. 73a, b.- 
Exsiccatt: Barth. N. Am. Ured. 1562; Ellis & Ev. N. Am. Fungi 2234; Garrett, Fungi Utah. 
34; Sydow, Ured. 1933. 
31. Micropuccinia Heucherae (Schw.) Arth. & Jackson; 
Arth. Bull. Torrey Club 48: 41. 1921. 
Uredo Heucherae Schw. Schr. Nat. Ges. Leipzig 1:71. 1822. 
Puccinia Saxifragae Schlecht. Fl. Berol. 2: 134. 1824. 
Caeoma Heucherae Link, in Willd. Sp. Pl. 62: 28. 1825. 
Puccinia Tiarellae Berk. & Curt. Grevillea 3:53. 1874. 
Puccinia spreta Peck, Ann. Rep. N. Y. State Mus. 29: 67. 1878. 
Puccinia congregata Ellis & Hark. Bull. Calif. Acad. 1:26. 1884. 
Puccinia Heucherae Dietel, Ber. Deuts. Bot. Ges. 9:42. 1891. 
Dicaeoma Saxifragarum Kuntze, Rev. Gen. 33: 467. 1898. 
Dicaeoma congregatum Kuntze, Rev. Gen. 33: 468. 1898. 
Dicaeoma Tiarellae Kuntze, Rev. Gen. 33: 470. 1898. 
Dicaeoma spretum Kuntze, Rev. Gen. 33: 470. 1898. 
Micropuccinia Saxifragae Rostr. Medd. Grgnland 30: 114. 1904. 
Dasyspora Saxifragae Arth. Résult. Sci. Congr. Bot. Vienne 347. 1906. 
O. Pycnia unknown, probably not formed. 
III. Telia amphigenous and caulicolous, chiefly hypophyllous, scattered or gregarious and 
frequently confluent, occasionally circinate, 0.5~3 mm. across, early naked, chestnut- or 
chocolate-brown, flat and pulverulent, or in germinating condition pulvinate and cinereous, 
ruptured epidermis usually not conspicuous; teliospores ellipsoid, oblong or somewhat fusi- 
form, 13-19 by 28-45 uw, rounded or obtuse above, rounded or narrowed below, slightly or 
not constricted at septum; wail light cinnamon-brown, 1-2 » thick, with broad thickening 
above up to 8, or with sub-hyaline papilla, smooth, or with evident longitudinal striae; 
pedicel colorless, fragile, twice length of spore or shorter, deciduous. 
Ow SAXIFRAGACEAE: : 
Heterisia Mertensiana (Bong.) Small (Sexifraga Mertensiana Bong.), Idaho, Washington. 
Heuchera americana L., North Carolina. 
Heuchera bracteata (Torr.) Seringe, Colorado. 
Heuchera cylindrica Dougl., Washington. 
Heuchera elegans Abrams, California. 
Heuchera glabella T. & G., Washington. : 
Heuchera glabra Willd., Alaska; British Columbia. 
Heuchera Hallii A. Gray, Colorado. 
