Part 4, 1920] AECIDIACEAE 303 
; III. Telia epiphyllous, numerous, crowded and sometimes confluent, oblong or oblong- 
linear, 0.5—-1 mm. long, early naked, pulvinate, dark chocolate-brown, ruptured epidermis 
inconspicuous; teliospores somewhat variable, obovoid to oblong-ellipsoid, 19-23 by 34-40 u, 
rounded or attenuate above, rounded or tapering below, moderately or only slightly constricted 
at septum; wall chestnut-brown, I~1.5 » thick, 6-9 » at apex, smooth; pedicel pale-yellow or 
nearly colorless, as long as spore. 
ON PoAckaE: 
Oryzopsis micrantha (Trin. & Rupr.) Thurb., Colorado, Montana, Nebraska, South Dakota. 
TYPE Locality: Billings, Montana, on Oryzopsis micrantha. 
DistRisuTion: Foothills of the Rocky Mountains and nearby plains from central Montana to 
southeastern Colorado. 
ILLusTRatiIons: Bull. Torrey Club 29: 298, f. &. 
ExsiccaTi: D. Griff. W. Am. Fungi 386. 
43. Dicaeoma Sporoboli (Arth.) Kuntze, Rev. Gen. 33: 470. 1898. 
Puccinia Sporoboli Arth. Bull. Iowa Agr. Coll. Dep. Bot. 1884: 159. 1884. 
O. Pycnia few, scattered, inconspicuous, honey-yellow turning darker later, globose, 
90-115 » wide by 100-150 « deep; ostiolar filaments protruding, up to 64 » in length. 
I. Aecia hypophyllous, in groups 2.5-3 mm. across, short-cupulate, 0.3-0.8 mm. in dia- 
meter; peridium honey-yellow, the margin recurved, lacerate; peridial cells linear-rhomboidal, 
16-23 by 23-32 y, considerably overlapping, the walls of about equal thickness, 5—7 », the 
inner one prominently verrucose, the outer one striate; aeciospores angularly globoid or ellip- 
soid, 16-18 by 21-26 u; wall pale-yellow, 1 « thick, very finely and inconspicuously verrucose, 
appearing almost smooth when wet. 
On LILIACEAE: 
Allium sp., proven by cultures, not yet collected in the field. 
Lilium umbellatum Pursh, Nebraska, North Dakota. 
II. Uredinia amphigenous, scattered, ovai or oblong, 0.5-0.7 mm. long; urediniospores 
lblate-spheroid, 25-29 » broad by 23-27 » long; wall dark cinnamon-brown, moderately thin, 
0.5—2 yw, moderately and finely echinulate, the pores 3, sometimes 4, basal, mostly near the 
hilum. , 
III. Telia amphigenous, numerous, crowded or scattered, often confluent, oblong or linear, 
0.5-2 mm. long, early naked, pulvinate, blackish-brown, ruptured epidermis not conspicuous; 
teliospores oblong or ellipsoid, 15-21 by 27-48 », rounded above and sometimes narrowed 
below; wall dark chestnut-brown, rather thin, 1.5 », thickened up to 10 above, smooth; 
pedicel light cinnamon-brown, as long as spore. 
On Poaceae: 
Sporobolus heterolepis A. Gray, Iowa, North Dakota. 
TYPE LOcALITy: Decorah, Iowa, on Sporobolus heterolepis. 
Distrisution: Locally on prairies from southern North Dakota to central Iowa and Nebraska. 
ILLUSTRATION: Bull. Lab. Nat. Hist. Univ. Iowa 4: #1. 6, f. 25a. 
Exsiccatr: Arth. & Holway, Ured. Exs. Ic. 25a; Brenckle, Fungi Dak. 344, 467. 
44, Dicaeoma verbenicola (Ellis & Kellerm.) Arth. Proc. Ind. 
Acad. Sci. 1903: 151. 1904. 
Aecidium verbenicola Ellis & Kellerm. Bull Torrey Club 11: 114. 1884. 
Puccinia Sydowiana Dietel, Hedwigia 36: 299. 1897. Not P. Sydowiana Zopf, 1879. 
Puccinia Vilfae Arth. & Holway, Bull. Iowa Lab. Nat. Hist. 4: 388. 1898. 
Dicaeoma Vilfae Arth. Proc. Ind. Acad. Sci. 1898: 185. 1899. 
Puccinia verbenicola Arth. Bot. Gaz. 35: 16. 1903. 
O. Pycnia mostly epiphyllous, few, in circular groups on discolored areas 2-5 mm. ir 
diameter, honey-yellow becoming brownish, globose in vertical section, 90-110 » broad; ostiolar 
filaments 20-45 » long. 
I. Aecia hypophyllous, in circular groups on discolored areas, 2-5 mm. in diameter, cupu- 
late, 0.2-0.3 mm. broad; peridium colorless, fragile, margin slightly recurved; peridial cells 
oblong, 16-26 by 29-42 u, abutted, the outer wall thick, 5-12 u, smooth, transversely striate, 
the inner wall thinner, 3-7 u, coarsely verrucose; aeciospores globoid or oblong, 18-23 by 23- 
31 uw; wall colorless, 1-1.5 » thick, conspicuously thickened above, up to 12, very inconspic- 
uously verrucose. 
