Entyloma eryngii-maritimi
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.
Not formally assessed. First described in 2014 in France and subsequently recorded just one in GB&I (North Devon vc.4, 2015).
Closely related Entyloma eryngii informally assessed as Endangered (Evans et al., 2006).
Host specific to Eryngium maritimum. Other species within the Entyloma genus are similarly host specific on other species of Eryngium.
Rarely recorded in GB&I, with global records only from France, Scotland, and Wales.