Xiphium Iris
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The bulbs are usually slightly larger than the reticulatas, and have a smooth tough skin. The leaf cross-section is semi-circular, and the stems are taller to 25-90cm (10”-36”). Five of the seven species are on the tender side, and are best grown in a bulb frame or alpine house.
I xiphium and its forms (the Spanish iris) will grow in a sheltered, sunny, well draining border.
Hybrids with other species developed the “Dutch” iris so beloved of florists. These will grow in any rich draining soil in the border among shrubs, or under light shading trees.
I latifolia with a wide range of blues, purples or whites require a damp, but not waterlogged spot. Although they are from the Pyrenees, they are called “English” iris, but are sadly short lived, and prone to virus.
Sidney Linnegar
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