Iris leptophylla, commonly known as Thin-Leaf Iris, is an evergreen perennial herb, native to the mountainous regions of North Central and South Central China. It thrives in alpine meadows and on rocky slopes where it experiences cool, moist conditions. This species is characterized by its rhizomatous growth habit with thin, long grey-green leaves that provide a delicate texture in garden settings. The plant typically reaches 15–35 cm (6–14 in) in height and features a slender stem, about 2 mm in diameter. The Thin-Leaf Iris is notable for its 2 to 3 fragrant flowers per stem, which come in shades of purple, blue-purple, violet, or lavender pink. These blooms are particularly showy during their flowering season in late spring to early summer, usually between April and June depending on the region.

The Thin-Leaf Iris is valued for its ornamental flowers and is suitable for rock gardens, alpine collections, and as a border plant in temperate climates. It requires well-drained soils enriched with grit and humus, and while it prefers full sun, it can also tolerate partial shade. This iris is not hardy in the UK and must be protected in an alpine house or bulb frame during colder months. In milder climates, such as some parts of Europe, it can be grown outdoors in rock gardens. It has low to medium water requirements and thrives in soils with medium to fast drainage. Gardeners should be aware that this plant may require protection from slugs and snails, which find the foliage attractive.CC BY-SA 4.0