Sub-category: Iris family
The species is widely cultivated and hybridized for use in the garden. It has a thin, slender rhizome, that is about 2 cm in diameter, fibrous and has a creeping habit. Under the rhizome are wiry roots. The creeping habit creates compact clumps of plants. They can reach over 90 cm wide. It has erect, slender, sword-shaped, acuminate (ending in a point), glaucous green to blue green basal leaves. They can grow up to between 25 to 90 cm long and 5 to 12 mm wide. They are normally nearly as long as the flowering stem. It has a strong, erect, round stem, that can reach up to between 50 to 80 cm long. The stem has 1 or 2 lateral, upright branches, or pedicels, which are about 2 cm long. The stem also has keeled, lanceolate, green, spathes (leaves of the flower bud) (or bracts). These are 40 to 80 cm long, and have a membranous tip. The stems (and branches) hold 1 to 4 terminal (top of stem) flowers. It has large, lightly scented, flowers that are up to 6 to 12 cm in diameter, and they come in shades of lilac, mauve-blue, violet-blue, purple-blue, violet, or blue. It has 2 pairs of petals, 3 large sepals, 3 tepals. They have purple or violet veining, and a central yellow or white stripe or signal area.
Grows on seasonally damp grasslands, damp meadows (or pastures), marshes, swamps, and salty flats. Commonly found near the edges of ponds. Blooms in summer, between May and July.