First Report of <i>Melampsora euphorbiae</i> on Poinsettia (<i>Euphorbia pulcherrima</i>) in Norway

Fig. 3. Uredinia with paraphyses (round heads) and some urediniospores (orange, next to the paraphyses) of Melampsora euphorbiae on a cross section of an infected leaf of poinsettia (Euphorbia pulcherrima cv. Cortez White). Photo by M. L. Herrero.

Image from Applied Turfgrass Science article:
First Report of Melampsora euphorbiae on Poinsettia (Euphorbia pulcherrima) in Norway