Iris tenax is known by the common names tough-leaved iris, Oregon iris, or flag. It is native to southwestern Washington, western Oregon, and northwestern California. It occurs along roadsides and in grasslands and forest openings. It has showy flowers that bloom in mid to late spring and are usually lavender-blue to purple, but blooms in white, yellow, pink, and orchid shades are known to sometimes occur.

The leaves are very slender for an iris. Its rhizomes spread slowly, causing the plant to grow in a tight clump.

Its species name tenax means "tough" or "tenacious" and is in reference to the strong, fibrous leaves of the plant, which have been reported to have been used by indigenous peoples for braiding into snares and other cordage.

Type: Hardy perennial

Hardiness zones: 5-9

Height: 12-18", 30-45cm

Location: Sun or part shade

Seeds per packet: 20