Puccinia aegopogonis Arthur & Holw. 1918

Dicaeoma aegopogonis (Arth. & Holway) Arthur & Fromme
Puccinia Aegopogonis Arth. & Holway; Arth. Am. Jour. Bot. 5: 467. 1918.
Pycnia epiphyllous, numerous, usualiy crowded in irregular groups, on yellow spots with roseate border, moderately conspicuous, golden-yellow, becoming brownish, globoid or flask-shaped in cross section, 100-150 m in diameter; ostiolar filaments present, compact.
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1. Aecia hypophyllous, irregularly crowded in more or less orbicular groups, up to 2 mm. across, cupuJate to short-cylindric, 0.1-0.2 mm. in diameter; peridium light-yellow, margin somewhat recurved, erose; peridial cells rhomboidal, 18-24 by 29-38 m, usually seen in face view, considerably overlapping, the outer wall colorless, smooth, transversely striate, 7 /* thick, the inner wall thinner, 2-4 m, finely and closely verrucose ; aeciospores globoid or ellipsoid, angular, 15-26 by 19-36 /j.; wall colorless, 1-2 n thick, thickened above up to 7 /*, closely and finely verrucose.
On Carduaceae:
Eupatorium Mairetianum DC, Guatemala.
Uredinia hypophyllous, scattered, oblong-linear, small, 0.2-0.5 mm. long, cinnamonbrown, pulverulent, early naked, ruptured epidermis apparent; urediniospores globoid or broadly ellipsoid, 21-25 by 23-29 ^; wall goldenor light cinnamon-brown, thin, 1-1.5//, finely and closely echinulate, the pores 6-8, scattered.