148 NORTH AMERICAN FLORA [VoLUME 7 
II, Uredinia chiefly hypophyllous and caulicolous, small, 0.3-0.8 mm. across, round, 
scattered, or confluent into large groups, especially on ribs and petioles, soon naked, cin- 
namon-brown, copiously pulverulent, ruptured epidermis inconspicuous; urediniospores 
fusiform-ellipsoid, sometimes nearly oblong, 21-27 by 32-45, acute or obtuse and some- 
what semihyaline at both ends; wall golden-brown, with distinct spiral rows of tubercles, 
sometimes anastomosing, thick, 44, somewhat thicker above, 5-7“, pores 2, near the base, 
large, indistinct. 
III. Telia chiefly epiphyllous, 0.3-0.8 mm. across, round, scattered, or somewhat gre- 
garious and confluent, soon naked, chocolate-brown, ruptured epidermis inconspicuous ; 
teliospores at first globose, soon strongly depressed at top and bottom, mature spores 
26-32 « broad by 21-27 # long; wall dark chocolate-brown, closely verrucose with low tuber- 
cles, thick, 4-5 #, slightly thicker at apex, often with a hyaline umbo ; pedicel colorless, firm, 
5 # thick, 50-75 # long. 
ON SPONDIACEAE: 
Rhus diversiloba T. & G., California, Colorado. 
Rhus floridana Mearns, Mississippi. 
Rhus radicans I,., Alabama, Colorado, Georgia, Illinois, Indiana, Iowa, Kansas, Louisiana, 
Massachusetts, Minnesota, Mississippi, Montana, Nebraska, New Jersey, New York, 
North Carolina, North Dakota, Ohio, Pennsylvania, South Carolina, Texas, Vermont, 
West Virginia, Wisconsin; Ontario; Hidalgo, Michoacan. 
Rhus Rydbergii Small, Wyoming. 
Rhus Toxicodendron is South Carolina. 
Schmalizia aromatica (Ait. ) Desv. (Rhus aromatica Ait), Ontario. 
Schmalizia malacophylla Greene, California. 
TYPE LocaLiry: Aiken, South Carolina, on Rhus Toxicodendron, 
DISTRIBUTION : Throughout North America, especially east of the Rocky Mountains. 
ExsiccaTi: Rav. Fungi Car. Exs.3: 94,97; Ellis, N. Am. Fungi 247, 248 ; Ellis & Ev. Fungi 
Columb. 176, 1699 ; Carleton, Ured. Am. 4; Kellerm. Ohio Fungi 120; Griff, West Am. Fungi 
283 ; Sydow, Ured. L361, 1408. 
2. Pileolaria extensa Arthur, sp. nov. 
QO. Pycnia amphigenous, thickly scattered over large areas, preceding or among the 
uredinia, papillose, honey-yellow becoming blackish, subcuticular, flattened-hemispherical, 
75-100 broad, half as high. 
Il. Uredinia amphigenous and caulicolous, evenly and thickly effused over young 
shoots and leaves, causing more or less atrophy, crowded, round, small, 0.25 mm. across, 
early naked, exceedingly pulverulent, dark cinnamon-brown, ruptured epidermis incon- 
spicuous; urediniospores fusiform-ellipsoid or fusiform-obovate, 16-24 by 28-38 4, obtuse or 
sometimes acute at both ends; wall dark golden-brown, often semihyaline both at apex and 
below, thick, 3-3.54, thicker above 4-7 #, verrucose with low tubercles, not crowded, hav- 
ing a tendency to be arranged in longitudinal rows, pores small, obscure, probably 3, 
equatorial. 
Ill. Telia unknown. 
ON SPONDIACEAE : 
Pistacia mextcana H. B.K. (Rhus mexicana A. Gray), Jalisco. 
Type collected at Zapotlan, Mexico, May 21, 1893, C. G. Pringle. 
EExSICCATI : Pringle, Mex. ‘Pungi 3. 
3. Pileolaria patzcuarensis (Holway) Arthur. 
Uromyces patzcuarensis Holway, Anu. Myc. 2: 393. 1904. 
O. Pycenia epiphyllous, gregarious, in small crowded groups 0.5-1 mm. across, papil- 
lose, noticeable, subcuticular, becoming blackish, flattened-hemispherical, 80-120 » broad, 
one-third as high. 
Il. Uredinia amphigenous, irregularly scattered, round, small, 0.1-0.2 mm. across, 
early naked, pulverulent, light cinnamon-brown, ruptured epidermis not noticeable ; ure- 
diniospores broadly fusiform-ellipsoid, 23-29 by 30-40 #, obtuse to acute at both ends; wall 
golden-brown, somewhat semihyaline both at apex and below, thick, 3-4 4, thicker above, 
5-8 #, verrucose, with low tubercles thickly set in close, rather evident, longitudinal rows, 
pores small, 3, equatorial. 
