Phragmidium rosae-rugosae

Aecia forming a large dense cushion on petioles, stems or fruits, and lower surface of leaves often causing conspicuous deformation, pulvinate, more or less pulverulent, bright orange-yellow;aeciospores sub-globose, broadly ellipsoid or somewhat angular, 20-28 x 16-22 µm, minutely verrucose, 2.0-3.0 µm thick, hyaline, walls orange-yellow;paraphyses numerous, clavate, 50-85 x 14-20 µm, walls smooth, uniformly thin, nearly hyaline. Uredinia hypophyllous, scattered or in groups, minute, 0.2-2.0 mm diameter, pale-yellow, pulverulent;urediniospores globose, sub-globose, obovate, or broadly ellipsoid, 18-25 x 15-24 µm, walls 1.5-3.0 µm thick, hyaline, finely verrucose, germ pores obscure, numerous, scattered;paraphyses clavate, 54-150 x 9-20 µm, erect or incurved, wall 1.5 µm thick;hyaline, sometimes slightly thicker at apex, up to 3.5 µm. Telia hypophyllous, scattered or gregarious, round or sub-round, 0.4-1.0 mm diameter, pulverulent, reddish-brown;teliospores cylindrical, (2-)4-6(-9)-septate, 60-138 x 32-47 µm, rounded at apex, walls 4-7 µm thick, yellowish-brown, coarsely verrucose with sub-hyaline tubercles, apical papilla obscure, up to 5 µm long, with three germ pores in each cell;pedicels hyaline, persistent, 45-168 µm long. See Wei (1988) and Hiratsuka et al. (1992) for more detailed descriptions.