Pentagon Lagoon Colorful Spring Tulips Arlington United States // ARLINGTON, Virginia — A dense planting of multicolored spring tulips blooms along the edge of the Pentagon Lagoon, framing a distant view of a marina and the Washington Monument. Belonging to the genus *Tulipa*, these perennial geophytes rely on a biological process called vernalization, requiring a specific number of cold winter hours to break bulb dormancy and produce flowers. The lagoon is a constructed inlet of the Potomac River managed by the National Park Service, where seasonal floral beds are cultivated to support urban

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