Phragmidium formosanum

Uredinia hypophyllous, scattered or loosely grouped, minute, early exposed, somewhat pulverulent, pale-yellow;paraphyses numerous, cylindrical or clavate, 30-50 x 8-12 µm, incurved, walls smooth, hyaline, 1.0-1.5 µm thick;urediniospores irregularly globose, obovate to ellipsoid, 16-33 x 10-16 µm, minutely echinulate, hyaline, walls 1.5 µm thick. Telia hypophyllous, scattered, minute, early exposed, 0.1-0.2 mm diameter, pulverulent, black;teliospores cylindrical, 2-4-septate, 34-102 x 18-27 µm, slightly attenuated at base, more or less constricted at septa, with a pale-brown projecting papilla at apex, chestnut-brown or yellowish-brown, pedicels hyaline, up to 47 µm long. See Wei (1988) for a more detailed description.