Puccinia circinata (Schwein.) Arthur 1918

Bullaria circinata (Schw.) Arthur & Mains
Uredo circinata Schw.; Berk. & Curt. Jour. Acad. Phila. 2: 282. 1853. Puccinia circinata Arth. Am. Jour. Bot. 5: 471. 1918.
Pycnia unknown
Uredinia amphigenous, scattered or in groups 2-3 mm. in diameter, rounded or oval, 0.3-1 mm. across, rather tardily naked, pulverulent, cinnamon-brown, ruptured epidermis conspicuous; urediniospores (dry or in alcohol) broadly ellipsoid or globoid, 22-26 by 26-32 n; wall goldenor dark cinnamon-brown, 2.5-3 fi thick, very sparsely and prominently echinulate, the echinulations 7-10 ^ apart, 2.5—4 ^ long, 1 /x wide, colorless, the pores 2-4, equatorial; urediniospores in water mount swelling, 27-32 by 32-40 /*; wall 5-7 p thick, consisting of a cinnamon-brown inner layer, 3-4 ft thick and a colorless outer layer, 1.5-4 p thick.