Spermagonia epiphyllous in groups, minute;aecia hypophyllous, caeomoid, in groups, yellow;aeciospores subglobose, 17-29 x 14-22 µm, wall hyaline, echinulate, 1-2 µm thick. Telia hypophyllous, scattered or gregarious, minute, round or irregular, 0.2-0.4 mm diameter, pulverulent, black;teliospores cylindrical, 4-6(-10)-septate, 57-147 x 22-43 µm, apex round with hyaline papilla up to 5 µm, two to three germ pores in each cell, wall chestnut-brown, minutely and closely verrucose, 3-5 µm thick;pedicels hyaline, up to 60 x 19 µm. See Ragunathan and Ramakrishnan (1973) for a more detailed description.
Related invasive species
- Phragmidium rosae-moschatae
Related Farm Practice
- Groups
This rust attacks species of Rosa native to Asia. None of these host species are related to species of common ornamental roses, thus this rust species does not appear to be a threat to the North American and other rose industries.