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 griffithii Iris griffithii is a species in the genus "Iris", it is also in the subgenus of Iris. It is a rhizomatous perennial, from Afghanistan. It has short, sickle-shaped leaves, short green stem and purple flowers with white beards. Several specimens exist within herbariums around Europe, but it is rarely cultivated.