Sori on living leaves, circular to irregular, 1–3.5 × 0.8–2.5 mm, initially as small yellowish spots, most times delimited by the secondary veins, spore balls embedded in the host tissue, visible as minute brown dots, scattered and raised. Spore balls permanent, 90–330 × 75–260 μm, irregular to subglobose, often lobed and with internal cavities, composed of sterile cells and teliospores distributed randomly within a sterile cells matrix, exposed by rupture or necrosis of the tissue; immature sori with a external external cortical layer (esporogenous cells) 3–20 μm thick. Teliospores globose to subglobose, sometimes subpolyhedral, 9–15(–20) × 10–15(–17) μm, pale brown to yellowish brown, walls 1 μm thick, smooth. Germination not observed.
Parasitic on Sagittaria montevidensis
Reported in Brazil from the states of Rio de Janeiro and Rio Grande Sul