Euphorbia chamaesyce, from González-Fragoso (1925a) : urediniospores and teliospores

gall

no host plant alternation. Aecia hypophyllous, dispersed all over the leaf, pale yellow, peridium inconspicuous. Uredinia mainly epiphyllous, brownish; spores dispersed fine-spinulose, with (4)5(6) pores. Also telia mainly epiphyllous, blackish brown. Teliospores 1-celled, ovoid with a low apical papilla; wall uniformly thin, finely verrucose; pedicel hyaline, short.

host plants

Euphorbiaceae, monophagous

Euphorbia chamaesyce, granulata, hirsuta, humifusa, hypericifolia, inaequilatera, oblongifolia, petiolata, polygonifolia, serpens.

notes

North American species that as an adventive pops up throughout Europe, generally without maintaining itself for long. The fungus is systemic and is dispersed through the seeds of its host plant.

references

Brandenburger (1985a: 341), Buhr (1964b), Gäumann (1959a), González-Fragoso (1925a), Klenke & Scholler (2015a), Vanderweyen & Fraiture (2008a).