Puccinia vacua Dietel & Holw. 1897

Bullaria vacua (Dietel & Holway) Arthur & Mains
Puccinia vacua Dietel & Holway; Holway, Bot. Gaz. 24: 30. 1897.
Pycnia amphigenous, fairiy numerous on yellowish or purplish spots with the uredinia, small, punctiform, noticeable, honey-yellow becoming cinnamon-brown, flattened-conic, 130160 n wide by 65-76 fx high; ostiolar filaments short.
II. Uredinia of the primary form epiphyllous, circulating about the pycnia in groups 0.4^1 mm. in diameter, otherwise similar to the secondary form; secondary uredinia hypophyllous, scattered, round or ellipsoid, 0.1-0.4 mm. across, tardily naked, pulverulent, paleyellow, ruptured epidermis conspicuous; urediniospores of both forms broadly ellipsoid or globoid, 20-26 by 22-29 i wall pale-yellow or colorless, 2-3 /x thick, moderately and prominently echinulate, the pores 3 or 4, equatorial, rather indistinct.