Douglas' Iris

Iris douglasiana (Iridaceae) is a rhizomatous beardless iris native to the coastal regions of northern and central California and southern Oregon. It grows about 1 foot tall from rhizomes typically less than 1 cm in diameter, producing leaves up to 2 cm wide and 1 m long. Flower color varies considerably by clone, ranging through shades of lavender, blue, purple, white, and cream.

Douglas' iris adapts to a broad pH range (4.5 to 8.5) and grows in open woods, grasslands, and fields on a variety of soil types. It performs in sun to part shade and, once established, needs supplemental water only during drought. Rhizomes and other plant parts are mildly toxic. The species has received the RHS Award of Garden Merit and naturalizes readily where conditions suit. Its tough fibers were historically used by indigenous peoples for cordage and textiles. Hardy in Zones 6a to 9b.