Uredinia hypophyllous, scattered or in small groups, minute, round, orange-yellow, pulverulent 0.1-0.6 mm;paraphyses clavate, erect or incurved, wall uniformly thin, 1 µm, hyaline;urediniospores globose to subglobose, obovate, broadly ellipsoid or obovoid, 18-26 x 16-23 µm, walls 0.8-1.5 µm thick, densely and coarsely echinulate, hyaline, contents orange-yellow or pale-yellow, germ pores obscure, approximately four to five, scattered. Telia hypophyllous, scattered or gregarious, minute, round or irregular, 0.2-0.6 mm diameter, pulverulent, black;teliospores cylindrical, (3-)6-7(-9)-septate, 63-147 x 24-43 µm, rounded at apex, not constricted at the septa, walls 4-6 µm thick, chocolate-brown, minutely and closely verrucose, with three germ pores in each cell, apical papilla lacking;pedicels hyaline, persistent, 53-119 µm long.
Related invasive species
- Phragmidium nambuanum
Related Farm Practice
- Groups
There is little published information on this plant pathogenic fungus, which has a limited geographic distribution. As hosts exist in other regions of the world with similar environmental conditions, this species may pose a threat to native or agricultural plants if introduced.