👉 Ptiloria is a genus of flowering plants in the family Rutaceae, which includes over 350 species native to Europe and Asia. These plants are commonly known as "black-eyed peas" due to their distinctive black and white flowers that resemble the eyes of an owl or other small animals. Ptiloriasis, also known as the 'black eye disease', is a parasitic fungal infection that affects the leaves and stems of these plants.