530 NORTH AMERICAN FLORA [VoLUME 7 
Puccinia diffusa Holway, N. Am. Ured. 1:13. 1905. 
Dasyspora Ranunculi Arth. Résult. Sci. Congr. Bot. Vienne 347. 1906. 
0: Pycnia unknown. 
III. Telia chiefly hypophyllous, numerous, scattered, commonly gregarious but not 
confluent, occupying large areas of leaf-surface, round, 0.4-0.8 mm. across, early naked, 
pulverulent, chestnut-brown, ruptured epidermis conspicuous; teliospores broadly ellipsoid, 
18-24 by 24-35 u, rounded above and below, scarcely constricted at septum; wall cinnamon- 
brown, uniformly thin, 1-1.5 », minutely and very inconspicuously verrucose-rugose; pedicel 
hyaline, fragile, short, occasionally laterally inserted; mesospores frequently intermingled. 
On RANUNCULACEAE: 
Ranunculus septentrionalis Poir., Illinois. 
Ranunculus sp., Mexico. 
TYPE LocALIty: Andes Mountains, Valdivia, Chile, on Ranunculus peduncularis. 
DIistRIBUTION: One collection each in northern Illinois and Mexico; also in South America. 
ILLUSTRATION: Holway, N. Am. Ured. 1: $l. 3, f. 16. 
17. Micropuccinia Ranunculi (A. Blytt) Arth. & Jackson; Arth. 
Bull. Torrey Club 48: 42. 1921. 
Puccinia Ranunculi A, Blytt, Forh. Vid.-Selsk. Christ. 18825: 12. 1882. 
Puccinia Blyitiana Lagerh. Bot. Notiser 1892: 169. 1892. 
Puccinia Nuttallii Ellis & Ev. Bull. Torrey Club 24: 283. 1897. 
Dicaeoma Blyttianum Kuntze, Rev. Gen. 33: 468. 1898. 
O. Pycnia unknown. 
III. Telia amphigenous, scattered or more commonly confluent, round, 0.5-2.5 mm. 
across, more elongate on petioles, somewhat tardily naked, pulverulent, blackish-brown, 
ruptured epidermis conspicuous; teliospores somewhat angularly ellipsoid or oblong, 19-26 
by 32-45 uw, rounded or obtuse above often narrowed below, not or scarcely constricted at 
septum; wall chestnut-brown, 1.5-2.5 » thick, with an abrupt subhyaline papilla over pore 
of upper and lower cell, irregularly tuberculate, the markings sparsely scattered or in ridges; 
pedicel colorless, fragile, short. 
A few spores (aeciospores?) occur in particularly vigorous sori in the Arizona collections, 
globoid, 16-20 by 18-24 u; wall colorless or light golden-brown, 1-15 » thick, very finely and 
closely verrucose, the pores obscure. 
On RANUNCULACEAE: 
Cyrtorhyncha neglecta Greene, Colorado. 
Cyrtorhyncha ranunculina Nutt. (Ranunculus Nutiallii A. Gray), Colorado, Wyoming. 
Ranunculus Eschscholizii Schlecht., Utah. 
Ranunculus glaberrimus Hook., Colorado. 
Ranunculus stenolobus Rydb., Utah. 
Ranunculus subsagitiatus (A. Gray) Greene, Arizona. 
Ranunculus Suksdorfii A. Gray, Washington; British Columbia. 
TYPE LocALity: Norway, on Ranunculus auricomus. 
DIstRisuTION: Central Colorado to Nevada, northward to British Columbia; also i _ aaa 
ILLUSTRATIONS: Beitr. Krypt. Schweiz 2?: f. 69; Holway, N. Am. Ured. I: pl. Sufed 
Exsiccatr: Barth. N. Am. Ured. 2631; Garrett, Fungi Utah. 109. 
18. Micropuccinia Berberidis-trifoliae (Dietel & Holway) 
Arthur & Jackson. 
Puccinia Berberidis-trifoliae Dietel & Holway; Holway, Bot. Gaz. 31: 328. 1901. 
O. Pycnia unknown. 
III. Telia hypophyllous, scattered, round, on discolored spots, conspicuously elevated, 
0.5—5 mm. across, early naked, pulvinate, compact, dark chocolate-brown, ruptured epidermis 
not conspicuous; teliospores irregularly ellipsoid, clavate or terete, 15-24 by 30—50 yw, rounded, 
obtuse, or attenuate above, rounded or more commonly narrowed below, not or slightly con- 
stricted at septum; wall chestnut-brown, 1.5-2.5 » thick, much thicker above, 4-13 », smooth 
or with a few indistinct striations most evident at apex; pedicel firm, concolorous, as long 
as spore; mesospores occasionally intermixed. 
On BERBERIDACEAE: 
Mahonia Swaseyi (Buckl.) Fedde (Berberis irifolia Schultes), Mexico (state). 
Type LocaLity: Rio Hondo, near City of Mexico, Mexico, on Berberis irifolia. 
