A smut appearing as a localised, greenish-gray discolouration in spots on the underside of leaves of Eryngium maritimum (sea holly) with small (0.1 – 3 mm) spores.
Sori in leaves forming ellipsoidal or polygonal, adaxial, flat to swollen, greenish gray spots, scattered over the leaf surface, 0.1–3 mm diam. Spores crowded, subglobose, ellipsoidal, subpolyhedral to irregular, 6–9 3 7–10 mm diam, [av. 6 SD, 7.6 6 1.4 3 8.3 6 1.8 mm, n 5 100/2] with hyaline matrix. Spore wall two-layered, uneven, 1–2 mm thick, with outer layer 1–1.5 mm thick, and inner layer 0.5 mm thick. Outer layer hyaline, smooth.