Iris macrosiphon (Long Tubed Iris) is a flowering plant in the Iridaceae (Iris) family, endemic to California in the Cascade Range Foothills, north and central Sierra Nevada Foothills, Inner North Coast Ranges, and San Francisco Bay Area, where it occurs in sunny grasslands, meadows, and open woodlands. The typical iris leaves are very slender, arching, strap-like, 2.5-5 millimeter wide, and blue-green in color. The flower is highly variable, from golden yellow to cream or pale lavender to deep blue-purple, generally with darker veins. In the wild it is usually found in clumps of the same general color. The flower stems are usually short (less than 25 centimeter) when in the sun and bear 2 flowers. It blooms in spring. It may go deciduous if subjected to summer heat or dryness.