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Zones 1-24, 28-45
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Iris pseudacorus

Yellow Flag
Iridaceae
Bulbs and bulblike plants, Perennials

IRIS

A large and remarkably diverse group of 200 to 300 species, varying in flower color and form, cultural needs, and blooming periods (although the majority flower in spring or early summer). Leaves are swordlike or grasslike. Flowers (fragrant, in many kinds) are showy and complex in structure.

Iris pseudacorus

Native to Western Europe and North Africa, but naturalized in eastern North America and the Pacific Northwest. Seeds float, aiding in the plant’s dispersal. This iris grows at the water’s edge, and makes an impressive foliage plant; under the best conditions, its upright leaves may reach 5 ft. tall. Flower stems produce yellow irises and grow 4–7 ft. tall.

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