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 dolichosiphon Iris dolichosiphon is a species in the genus "Iris", it is also in the subgenus of Iris and in the "Pseudoregelia section". It is a rhizomatous perennial, from China and Bhutan. It has long, thin dark green leaves, very short stem, and dark blue, purple, or violet flowers. That are mottled with white. It has thick white/orange beards. It has one subspecies, "Iris dolichosiphon subsp. orientalis", from China, India and Burma. It has similar flowers. They are cultivated as ornamental plants in temperate regions