Sunday, May 20, 2012. The delicate and fragrant swamp lily (Crinum americanum) is a Florida native. It grows in wetlands and along streams throughout the state. The swamp lily is a perennial herb, with an onion-like bulb. The leaves are erect to spreading. Leaves are strap-like, up to 3 feet long and 3 inches wide. Swamp lily flowers arise from the bulb on a long flower stalk that is separate from the leaves. Two to six flowers occur at the tip of the flower stalk. The long flower tubes are 4 to 6 inches long. Swamp lily flowers are white, or white and pink, and are fragrant. They have 6 petals. The fruit is a capsule, with large, fleshy seeds.