A rust fungi attacking this Chamaesyce, visible as orange spots beneath the leaves. It has also caused this plant to develop atypical flowers and upright growth.

Going by https://books.google.com/books?id=sIdNAAAAYAAJ&printsec=frontcover&source=gbs_ge_summary_r&cad=0#v=onepage&q=%3A%20chamaesyce%20albomarginata&f=false

and several other sources, seems to be the only known species from this plant and commonly infects the genus.