Black Rot of Orchids Caused by <i>Phytophthora cactorum</i> and <i>Phytophthora palmivora</i> in Florida

Fig. 3. Paragynous antheridium and oogonium of Phytophthora cactorum (top of figure) and amphigynous antheridium and oogonium of Phytophthora palmivora (bottom of figure).



Image from Plant Health Progress article:
Black Rot of Orchids Caused by Phytophthora cactorum and Phytophthora palmivora in Florida