In between Diplarrena moraea and Talinum which one is  known as white iris?
Talinum Talinum is a genus of herbaceous succulent plants in the family Talinaceae (formerly in the family Portulacaceae) whose common names include fameflower and flameflower. Several species bear edible leaves, and "Talinum fruticosum" is widely grown in tropical regions as a leaf vegetable. "Talinum paniculatum" is grown as an ornamental plant.
Iris afghanica Iris afghanica is a species in the genus "Iris", it is also in the subgenus of Iris and in the "Regelia section". It is a rhizomatous perennial, from Afghanistan, with thin bluish-green leaves and creamy yellow or white flowers, that are veined with purple-brown. It has yellow-green or purple beards. Although, in the wild, it can vary in colour and size. It is cultivated as an ornamental plant in temperate regions.