& 
Part 4, 1920] AECIDIACEAE 301 
0.4 mum. in diameter, golden-brown, surrounded by hypertrophied host tissue, gall-like, open- 
ing by a central aperture; peridium fragile and evanescent; peridial cells abutted or slightly 
imbricate, ovoid or oblong, 19-27 by 26-58 y, the walls colorless, the outer wall inconspicuously 
verruculose, 2~4 4 thick, the inner wall thicker, 3-7 yu, tessellated with distinct, irregular 
elevations; aeciospores globoid, 21-26 by 22-29 »; wall cinnamon-brown, moderately thick, 
1.5-2 4, sometimes 3-5 p, evenly and finely verrucose, occasionally tuberculose, the pores 
sometimes apparent, 6-8, scattered. 
ON CICHORIACEAE: 
Agoseris laciniata (Nutt.) Greene, Colorado. 
Agoseris leptocarpa Osterhout, Colorado. 
Crepis acuminata Nutt., Montana. 
Crepis glauca (Nutt.) T. & G., Utah. 
Lygodesmia juncea (Pursh) D. Don, Colorado, Montana, Nebraska, South Dakota. 
On CaRDUACEAE: 
Aster amethystinus Nutt., Nebraska. 
Aster exiguus (Fernald) Rydb., Nebraska, North Dakota. 
Aster multiflorus Ait., Iowa, Kansas, Nebraska, South Dakota. 
Aster Portert A. Gray, Colorado. 
Chrysopsis villosa (Pursh) Nutt., Arizona, Colorado, Montana, Nebraska. 
Chrysothamnus graveolens (Nutt.) Greene (Bigelovia graveolens A. Gray), Colorado. 
Chrysothamnus pulcherrimus A. Nelson, Colorado. 
Chrysothamnus serrulatus (Torr.) Rydb. (Bigelovia Douglasii serrutata Gray), Colorado. 
Chrysothamnus viscidiflorus (Hook.) Nutt. (Bigelovia Douglasii A. Gray), Colorado. 
Erigeron flagellaris A. Gray, Colorado. 
Grindelia squarrosa (Pursh) Dunal, Colorado, Nebraska, North Dakota, South Dakota. 
Gutierrezia Sarothrae (Pursh) Britton & Rusby (G. Euthamiae T. & G.), Colorado, Montana, 
Nebraska, Texas. 
Senecio densus Greene (S. compactus Rydb.), Colorado. 
Senecio integerrimus Nutt., Colorado. 
Senecio oblanceolatus Rydb., Colorado. 
Senecio perplexus A. Nelson, Colorado, Wyoming. 
Senecio pudicus Greene (S. cernuus A. Gray), Colorado. 
Senecio Riddellii T. & G., Nebraska. 
Senecio salicinus Rydb., Colorado. 
Senecio spartioides T. & G., Colorado. 
Solidago concinna A. Nelson, Colorado. 
Solidago glaberrima Martens, Colorado, Nebraska, North Dakota. 
Solidago mollis Bartl., Montana, Nebraska, North Dakota, South Dakota; Alberta. 
Solidago rigida L., Nebraska, North Dakota. . 
Solidago serotina Ait. (S. Pitcheri Nutt.), New Mexico. 
II. Uredinia' mostly epiphyllous, oblong, small, 0.3-0.4 mm. long, cinnamon-brown, 
inconspicuous, early naked; urediniospores broadly ellipsoid or obovoid, 18-23 by 21-26 un; 
wall moderately thin, 1.5-2 », golden-brown or yellow, closely and finely echinulate, the pores 
6-8, scattered. 
II. Telia epiphyllous, stattered or crowded, ovate to oblong, 0.5-2 mm. long, early naked, 
dark chocolate-brown, pulvinate, ruptured epidermis not conspicuous; teliospores ellipsoid, 
oblong or cylindric, 18-23 by 35-64 », rounded, obtuse or sometimes truncate above, rounded 
or narrowed below, noticeably constricted at septum; wall dark golden- to chestnut-brown, 
1.5-2 » thick, 5-10 4 at apex; pedicel usually persistent, slightly tinted, 2-3 times length 
of spore. 
On POACEAE: ine Sunred 
Koeleria cristat .) Pers., Colorado. : 
Onyotsis jaenbiaes (R. & S.) Ricker (O. cuspidata Benth., Eriocoma cuspidata Nutt.), 
Arizona, Colorado. . 
Stipa avida M. E. Jones, Arizona. . : . 
Stipa californica Merr. & Davy, California ; Lower California. 
Stipa comata Trin, & Rupr. (S. Tweedyi Scribn.), Arizona, Colorado, Montana, Nebraska, 
Oregon, North Dakota, South Dakota, Utah, Wyoming; Manitoba. 
j j Cav., Hidalgo. . : . 
a Lepida Ander ont. (sey) Hitche. (S. eminens Andersoni Vasey), California. 
Stipa leucotricha Trin. BS aly Lower California. 
: hra Hitche., California. 
ies es T an., Colorado, Iowa, Minnesota, Nebraska, North Dakota, South Dakota, 
Wisconsin. 
Stipa sp., perenne Siatanieg 
: , on Slipa 4 ; 
ens Gioia MU nioba: and ep are eerie to Texas and central Mexico. 
‘ jl. Lab. Nat. Hist. Univ. Iowa 4: pl. /, f. 2/a-c. 
ee eh noe. Ured. Exs. Ic. 27a-c; Barth. N. Am. Ured. 61, 662, 663, 971, 
1777, 1869, 2061, 2165, 2166, 2267, 2268, 2269; Barth. Fungi Columb. 3466, 3572, 4672, 4976, 
4077. Brenckle, Fungi Dak. 67, 103, 188, 201; Ellis & Ev. N. Am. Fungi 2245; Ellis & Ev. Fungi 
Columb. 1476, 1663, 1703, 1804, 2160; Garrett, Fungi Utah. 237; D. Griff. W. Am. Fungi 280, 383, 
