Part 7, 1922] AECIDIACEAE 529 
13. Micropuccinia gemella (Dietel & Holway) Arthur & Jackson. 
Puccinia gemelia Dietel & Holway; Sydow, Monog. Ured. 1: 541. 1903. 
O. Pycnia unknown. 
; TI. Telia amphigenous and petiolicolous, scattered, round or oblong, 0.8-1.5 mm. 
across, early naked, pulverulent, pale cinnamon- or chocolate-brown, ruptured epidermis 
conspicuous; teliospores fusiform or fusiform-oblong, 20-26 by 40-58, narrowed above 
and below, not constricted at septum; wall chestnut-brown, rather thin, I-1.5 4, thickened 
into a lighter colored umbo at apex, 5-10», smooth (sometimes teliospores 15-21 by 40-50 x, 
germinating at once, the wall nearly colorless); pedicel colorless, fragile. 
ON RANUNCULACEAE: 
Caltha biflora DC., Oregon, Washington. 
Caltha Howellii Greene, California. 
Caltha leptosepala DC., Alaska, Idaho, Washington. 
TYPE LocaLity: Mt. Tacoma [Rainier], Washington, on Caltha leptosepala. 
DistrisutTion: Locally in northwestern United States and southeastern Alaska. 
ILLUSTRATION: Holway, N. Am. Ured. 1: 9l. 1, f. 3. 
Exsiccati: Barth. Fungi Columb. 4057; Barth. N. Am. Ured. 634; Sydow, Ured. 1769. 
14. Micropuccinia Treleasiana (Paz.) Arthur & Jackson. 
Puccinia Treleasiana Paz.; Rab.-Wint.-Paz. Fungi Eur. 3821 (Hedwigia 31:317). 1892. 
O. Pycnia unknown. 
III. Telia amphigerfous and petiolicolous, scattered or somewhat gregarious, often con- 
fluent, round or oblong, 0.8—2 mm. across, early naked, pulverulent, chocolate-brown, ruptured 
epidermis conspicuous; teliospores ellipsoid, 19-25 by 33-48 w, rounded or somewhat obtuse 
above and below, slightly or not constricted at septum; wall light chestnut-brown, rather 
thin, 1~2 y, thickened into a low, pale umbo at apex, 3-6 uw, very minutely rugose, appearing 
smooth when wet; pedicel colorless, short, one-half length of spore. 
On RANUNCULACEAE: 
Caltha biflora DC., Washington. 
Caltha leptosepala DC., British Columbia. 
Caltha rotundifolia (Huth) Greene (C. leptophylla rotundifolia Huth, C. chionophila Greene), 
Colorado, Nevada, Utah, Wyoming. 
Type LocaLiry: Argentine Pass, Colorado, on Calthe leptosepala, now determined as C. ro- 
tundifolia. 
DIsTRiBuTION: Colorado northward into Canada. 
ILLUSTRATION: Holway, N. Am. Ured. 1: pl. 1, f. 5. 
Exsiccati: Barth. Fungi Columb. 2470; Barth. N. Am. Ured. i71 ; Clements, Crypt. Fornn, 
Colo. 326; Ellis & Ev. Fungi Columb. 1868; Ellis & Ev. N. Am. Fungi 3244; Garrett, Fungi Utah. 
23; Sydow, Ured. 1944; Rab.-Wint. Fungi Eur. 3821. 
15. Micropuccinia Delphinii (Dietel & Holway) Arthur & Jackson. 
Puccinia Delphinii Dietel & Holway; Dietel, Hedwigia 32: 29. 1893. 
Dicaeoma Delphinii Kuntze, Rev. Gen. 33: 468. 1898. 
O. Pyenia not seen. 
Ill. Telia chiefly hypophyllous and petiolicolous, small, round, 0.3-0.5 mm. across, 
gregatious and often confluent, covering large areas of leaf-surface, chestnut-brown, early 
naked, pulverulent, ruptured epidermis conspicuous; teliospores ellipsoid, 16-24 by 24-32 un, 
rounded at both ends, scarcely constricted at septum; wall cinnamon-brown, uniformly 
thin, 1-1.5 2, minutely and inconspicuously verrucose; pedicel short, fragile. 
On RANUNCULACEAE: 
Delphinium sp., California. . : - 
‘TYPE ee King’s River Canyon, California, on Delphinium sp. 
DistRIrnvt1ion: Known only from the type locality. 
ILLUSTRATION: Holway, N. Am. Ured. 1: pl. 1,f. 6. 
16. Micropuccinia andina (Dietel & Neger) Arth. & Jackson; 
Arth. Bull. Torrey Club 48: 40. 1921. 
Puccinia Ranunculi Seym.; Burrill, Bot. Gaz. 9: 191. 1884. Not P. Ranunculi A. Blytt, 1882. 
Dicaeoma Ranunculi Kuntze, Rev. Gen. 3°: 470. 1898. 
Puccinia andina Dietel & Neger, Bot. Jahrb. 27:4. 1899. 
