👉 Archegonia is a genus of flowering plants in the family Arecaceae, commonly known as the "mushroom" or "cactus". These plants are native to South America and grow on rocks, cliffs, and other hard surfaces. They have a distinctive shape with a flattened stem that resembles an arch. The scientific name for this genus is "Euphorbia", which means "butterfly" in Latin. The specific epithet ("archegonia") comes from the