Erect perennial herbs, about 30-50 cm tall. Rhizomes are creeping and knobby, with thick and short internodes and light yellow. The leaves are tapered and sword-shaped, and they are very wide.

The original (17) of Yang Zuoren's Iris Atlas is 2-4 cm long, 30-45 cm thin and light green, arranged alternately in two columns, with overlapping bases. Flowering period from spring to early summer, raceme 1-2 branches, each with 2-3 flowers; Hua Hudie-shaped, the corolla is blue-purple or purple-white, with a diameter of about 10 cm, and the outer three pieces are larger and drooping round; The inner 3 pieces are smaller and rounder; The outer perianth has dark purple spots, and the central surface has a row of crista cristata white with purple ridges. The flowering period is from April to June, and the fruiting period is from June to August. Stamens 3, opposite to the outer perianth; Style 3-forked, flat as petals, covered with stamens. Flowers come out of the leaves in blue, purple, yellow, white, reddish and other colors, with large and beautiful patterns. Capsule is rectangular with 6 edges. There are all kinds of iris lactiflora, with white flowers and light yellow stripes at the base of the outer perianth.

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Strong cold tolerance, which can be divided into (1) according to habits. It requires moderate humidity, good drainage and rich humus. iris

Weak alkaline cohesive soil; (2) Born in swamp soil or shallow water; (3) Born in shallow water; (4) Like sunshine, cool climate, strong cold resistance and semi-cloudy environment.