Congea and Sempervivum, are which type of items?
Congea Congea is a small genus of flowering plants in the mint family, Lamiaceae, first described in 1820.
Sedum album Sedum album or white stonecrop, is a flowering plant of the genus "Sedum" in the family Crassulaceae. It is found in the northern temperate regions of the world, often growing in crevices or free-draining rocky soil. As a long-day plant it grows vegetatively for most of the year and flowers in summer.