Spermogonia epiphyllous, numerous, punctate, irregularly and closely aggregated or scattered, minute, at first honey-yellow, then reddish-brown. Telia amphigenous, or on stipules, densely developed over entire leaf surfaces, early naked, confluent, somewhat pulverulent, reddish-brown, ruptured epidermis conspicuous;teliospores broadly ellipsoid or oblong to oblong-ellipsoid, 1-2-septate, 30-50 × 16-35 µm, rounded at apex, rounded or somewhat attenuated at base, slightly constricted at septa, two or three germ pores in each cell, walls 2.0-3.5 µm thick, pale yellow-brown, with three to five rows of warts;pedicels persistent, very short. See Wei (1988) and Hiratsuka et al. (1992) for more detailed descriptions.
Related invasive species
- Phragmidium kamtschatkae
Related Farm Practice
- Development
- Attenuation
- Rupture
There is little published information on this plant pathogenic fungus, which has 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.