Plant Parasites of Europe

leafminers, galls and fungi

Uromyces excavatus

Uromyces excavatus (de Candolle) Magnus, 1847

on Euphorbia


No host plant alternation. Spermogonia and aecia hypophyllous, uniformly dispersed all over the leaf. Uredinia missing. Telia hypophyllous, almost black, pustulate, sunken into the leaf tissue; spores one-celled; wall very finely verrucose, moreover in the upper half a sculpture of fine rods; apically a small, hyaline papilla. Infected plants are bushy, with short, broad, strongly thickened leaves.


Euphorbiaceae, narrowly monophagous

Euphorbia flavicoma subsp. costeana, verrucosa.


sometimes considered conspecific with U. tuberculatus.


the fungus has been found sometimes together with the aecia of U. verrucosae-craccae.


Brandenburger (1985a: 339), Buhr (1964b), Gäumann (1959a), González-Fragoso (1925a), Klenke & Scholler (2015a), Pellicier (2001a), Termorshuizen & Swertz (2011a).


Last modified 16.vii.2017