426 NORTH AMERICAN FLORA [VoLuME 7 
urediniospores broadly obovoid or globoid, 19-23 by 23-28; wall pale cinnamon-brown, 
thin, 1 4, minutely and closely echinulate with points about 1.5 » apart, the pores very ob- 
scure, probably more than 2, scattered. 
III. Telia hypophyllous, numerous, scattered, round, early naked, small, 0.1-0.4 mm. 
across, pulvinate, dark cinnamon-brown, or cinereous by germination, ruptured epidermis 
inconspicuous; telicspores oblong or obovoid, 18-25 by 33-48 u, rounded or obtuse at both 
ends, often narrowed below, slightly or not constricted at septum; wall smooth, pale yellowish- 
brown, concolorous, thin, 1-1.5 u, somewhat thickened at apex, 2-4 y; pedicel nearly or quite 
colorless, terete, slender, 3-8 u thick, about length of spore. 
On CARDUACEAE: 
Conyza asperifolia (Benth.) Benth. & Hook. (Baccharis hirtella DC.), Oaxaca; Costa Rica; 
Guatemala. 
TYPE LOCALITY: Oaxaca, Mexico, on Baccharis hiriella. 
DISTRIBUTION: Southern Mexico and Central America. 
245. Dicaeoma aemulans (Sydow) Arthur & Jackson. 
Puccinia Gymnolomiae Dietel & panies Garrett, Fungi Utah. 15, hyponym. 1904. 
Puccinia aemulans Sydow, Ann. Myc. 4: 31. 906. 
O. Pycnia epiphyllous, crowded on yellowish spots 1-3" mm. in diameter, noticeable, 
light chestnut-brown, globoid, 90-112 » in diameter; ostiolar filaments up to 65 » long, usually 
agglutinated into a column. 
I. Aecia hypophyllous, crowded in groups 1-3 mm. in diameter, cupulate, small, 0.1- 
0.3 mm. in diameter; peridium white, the margin erect, erose; peridial cells oblong or rhom- 
boidal, 16-23 by 27-42 yu, overlapping by a downward projection of the outer wall, the outer 
wall 6-10 thick, transversely striate, the inner wall thinner, 5-7 yu, very closely and finely 
verrucose; aeciospores globoid or broadly ellipsoid, 15-20 by 18-24 yw; wall colorless, rather 
thin, 1-1.5 », very closely and inconspicuously verrucose. 
II. Uredinia chiefly hypophyllous, scattered, round, small, 0.2-0.4 mm. across, early 
naked, pulverulent, cinnamon-brown, ruptured epidermis inconspicuous; wrediniospores 
flattened-globoid or obovoid, appearing round or obovate with pores in surface view, 19-23 
by 20-26 », appearing triangular with pores in optical section, somewhat narrower, 17-21 yu; 
wall pale cinnamon-brown, thin, 1-1.5 u, finely and closely echinulate, the pores rather in- 
distinct, 2, opposite and slightly subequatorial. 
III. Telia chiefly hypophyllous, scattered or occasionally gregarious in annular groups, 
small, 0.2-0.5 mm. in diameter, early naked, compact, pulvinate, blackish-brown, ruptured 
epidermis noticeable; teliospores ellipsoid, oblong, or obovoid, 22-28 by 35-55 u, rounded above, 
rounded or somewhat narrowed below, slightly or not constricted at septum; wall chestnut- 
ot dark cinnamon-brown, 2-3 » thick, thickened at apex, 7-12 », smooth, the pore of upper 
cell at apex, of lower cell at septum; pedicel colorless, once to twice length of spore. 
On CARDUACEAE: 
Heliomeris multiflora Nutt. (Gymnolomia multiflora Benth. & Hook.), Arizona, Colorado, 
New Mexico, Utah, Wyoming. 
TYPE LOCALITY: [Wasatch Mountains near Salt Lake City], Utah, on Gymnolomia mali fore: 
DISTRIBUTION: Mountains of Wyoming to Utah and New Mexico. 
Exsiccatt: Barth. Fungi Columb. 4/36; Barth. N. Am. Ured. 415, 727; Clements, Crypt. oral. 
Colo. 138, 545; Garrett, Fungi Utah. 15, 16, 42; Sydow, Ured. 1921, 1922, 1923; Vesterg. Micr. 
Rar. Sel. 1561. 
246. Dicaeoma (?) Gymnolomiae (Arth.) Arthur & Jackson. 
Puccinia Gymnolomiae Arth. Bot. Gaz. 40:200. 1905. Not P. Gymnolomiae Dietel & Holway, 1904. 
O and I. Pycnia and aecia unknown. 
II. Uredinia hypophyllous, abundant, scattered, round, small, 0.2-0.4 mm. across, early 
naked, pulverulent, bright cinnamon-brown, ruptured epidermis inconspicuous; uredinio- 
spores globoid in face view, 23 by 23-26 u, obovate-globoid or triangular in side view, 19 by 
23-26 »; wall golden- or light cinnamon-brown, rather thin, 1.5-2 4, closely and strongly 
echinulate, the pores 2, opposite and subequatorial. 
III. Telia hypophyllous, scattered, round, small, 0.2-0.4 mm. across, early naked, at 
first pulvinate becoming somewhat pulverulent, chestnut-brown, ruptured epidermis incon- 
