(Leipzig) 3(3): 450 (1898) Uromyces euphorbiae is a fungal species (in the Pucciniaceae family and Pucciniales order) and a plant pathogen infecting poinsettias.

It was originally found on the leaves of Euphorbia hypericifolia in New York, USA.

[5] It is known by the rust pustules which are delimited by a necrotic band which has a reddish-brown border.

Uromyces euphorbiae can be distinguished from other Uromyces fungal species found on various Euphorbia species (in Turkey) by comparing its macrocyclic life cycle, dark brown teleutospores and also the big warts located on the teleutospores wall.

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