Iris typhifolia Kitag.

Rhizomes creeping. Leaves linear, twisted, 30--40 cm × ca. 2 mm at anthesis, ca. 90 cm × 6 mm in fruit, midvein distinct, base surrounded by persistent fibers, apex long acuminate. Flowering stems 50--60 cm, hollow, 2- or 3-leaved; spathes 3 or 4, green, reddish brown at margin, lanceolate, 5.5--6 × 1--1.2 cm, 2-flowered, apex acuminate. Flowers dark violet, 6--7 cm in diam.; pedicel 1--5 cm. Perianth tube ca. 5 mm; outer segments obovate, 5--5.5 × ca. 2 cm; inner segments erect, oblanceolate, 4.5--5 × 1--1.2 cm, apex retuse. Stamens ca. 3 cm; anthers yellow-brown. Ovary cylindric, 1.5--2 cm × 2--3 mm. Style branches ca. 3.5 × 1--1.2 cm. Capsule ellipsoid, 4.5--5 × 1.2--1.5 cm, 3-angled, 6-veined. Fl. May--Jun, fr. Jul--Sep.

* Damp areas near lakes. W Jilin, Liaoning, Nei Mongol.