Phragmidium griseum

Uredinia hypophyllous, scattered or irregularly grouped, round or sub-round, 0.3-0.8 mm diameter, early naked, pulvinate, finally pulverulent, orange-yellow, pale-yellow;paraphyses clavate, 34-70 x 7-16 µm, erect or incurved, wall smooth, colourless, uniformly thin, 1 µm;urediniospores subglobose, obovate, pyriform, ellipsoid or irregularly ellipsoid, 18-30 x 13-21 µm;walls 1.5 µm thick, densely and coarsely echinulate, inconspicuous or smooth at the base;contents orange-yellow or pale-yellow. Telia hypophyllous, scattered or gregarious, round or ellipsoid, 0.2-0.7 mm diameter, subpulvinate, early naked, reddish-brown;teliospores cylindrical, (1-)2-3(-5)-septate, 38-106 x 18-28 µm, rounded at the apex, rounded or somewhat attenuate at the base, not or slightly constricted at the septum, two or three germ pores in each cell, walls 2-3 µm, pale yellow-brown, with three to five rows of warts, pedicels sub-hyaline, persistent, 20-114 x 10-16 µm, 1-septate, not hygroscopic. See Wei (1988) and Hiratsuka et al. (1992) for more detailed descriptions.