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Showy, bright white, tri-petaled flowers with burgundy interior spots and a boss of bright yellow stamens form cups or flatten out. Blooming June through September, they're surrounded by wide, glossy, arrow-shaped leaves to 2.5' tall. It's native to surprisingly disparate areas of North America and South America, in bogs, swamps, marshes, and even tidal flats — just so it has wet and muddy feet. Colonizing.
Minimum temperature: 0° F