Phragmidium duchesneae P. Syd. & Syd. 1912

Kuehneola duchesneae Arthur, sp. nov
O. pycnia chiefly epiphyllous, in small crowded groups, often confluent, inconspicuous, indefinitely mammilloid, often extending between and obliterating the epidermal cells,
90-130// broad by 50-55 // high.
II. Uredinia at first (primary) amphigenous and surrounding the pycnia» soon (secondary) quite hypophyllous and scattered, round, 0.3-0.8 mm. across, early naked, slightly pulvinate, pulverulent, yellow becoming pale, ruptured epidermis noticeable ; paraphyses with secondary uredinia few, peripheral, not reaching above the spore-mass, cylindrical, nearly or quite erect, 8-12 by 40-50 fi, the wall uniformly thin, 1 // or less, colorless, smooth ; urediniospores broadly ellipsoid or globoid, 14-17 by 16-23^; wall nearly or quite colorless, thin, 1/i or less, minutely and closely echinulate, points 1-1. S fJapart, the pores small, inconspicuous, 3, equatorial.