Portulaca, 9 O Clock Plants Portulaca is a genus of flowering plants in the family Portulacaceae. They are also known as purslane or moss roses. These plants are native to warm, dry regions and are known for their succulent stems and leaves and brightly colored flowers. They are popular as ornamental plants in gardens, and some species are grown for their edible leaves and stems, which are high in nutrients and have a slightly sour and salty taste. Portulaca plants are easy to care for and require little maintenance. They prefer well-draining soil and full sun, but can tolerate drought and poor soil conditions. Regular watering is not necessary, as these plants have succulent stems and leaves that can store water.