Puccinia erratica H. S. Jacks. & Holw. 1918

Dicaeoma erraticum (Jackson & Holway) Arthur
& Jackson.
Dietelia Vernoniae Arth. Bot. Gaz. 40: 198. 1905. Not Dicaeoma Vernoniae Kuntze, 1898.
Endophyllum Vernoniae Arth. N. Am. Flora 7: 126. 1907.
Puccinia erratica Jackson & Holway; H. S. Jackson, Bot. Gaz. 65: 294. 1918.
Pycnia epiphyllous, numerous, in crowded groups 1 mm. across, in the center of yellowish spots 0.5-1 cm. in diameter, conspicuous, subepidermal, orange becoming blackish, globose or flask-shaped, 120-145 by 145-160 ju; ostiolar filaments not extruded.
1. Aecia hypophyllous, few or soUtary, crowded on the under surface of yellowish spots opposite the pycnia or occasionally more or less scattered, bullate, 0.2-0.5 mm. across ; peridium wanting; aeciospores somewhat irregularly ellipsoid, oblong or piriform, 23-28 by 32-38 m» somewhat flattened, the wall colorless, 2-3 ju thick, prominently and closely verrucose-rugose, with tendency toward an arrangement in lines and becoming united to form ridges at one end of the spore, tubercles often deciduous.
Uredinia hypophyllous, few, scattered, roundish, small, 0.1-0.3 mm. across, rather tardily naked, pulverulent, cinnamon-brown, ruptured epidermis conspicuous; urediniospores globoid or broadly obovate, 23-28 by 29-34 /x; wall cinnamon-brown, 1-1.5 ju. moderately echinulate, the pores 3, approximately equatorial.