What's the name of this flower?

Iris (scientific name: Iris), also known as Iris Roof (China Journal of Botany), Blue Butterfly (Guangzhou), Purple Butterfly, Bambusa oblata (Shaanxi) and Bufo Qi (Hubei), belongs to Iris of Iridaceae. It belongs to asparagus, a perennial herb of Iris, with thick roots and a diameter of about 1cm, extending obliquely; Leaf length 15~50cm, width 1.5~3.5cm, blue-purple flowers, and diameter of about10 cm; . Capsule oval or obovate, 4.5 ~ 6 cm long and 2 ~ 2.5 cm in diameter.

It is distributed in Japan, Chinese mainland and other places, growing in areas with an altitude of 500 meters to 3,800 meters, generally growing in sunny slopes, forest margins and waterside wetlands, and has not been artificially introduced and cultivated at present. Its pattern is big and beautiful, which can be viewed. Its rhizome can be used as medicine and can be collected all year round, which has anti-inflammatory effect.