Center for Aquatic Plants - Aquatic, Wetland and Invasive Plant Particulars and Photos Aquatic, Wetland and Invasive Plant Particulars and Photographs University of Florida, Center for Aquatic and Invasive Plants Crinum americanum Swamp lily S wamp lily is an emersed plant that grows in wetlands and along streams. It is a fragrant native. T he swamp lily is a perennial herb with an onionlike bulb . The leaves are erect to spreading.
Leaves are straplike, to three feet long.
The leaves are to three inches wide. Swamp lily flowers arise from the bulb on a long flower stalk that is separate from the leaves. The flowers have six petals and are white or white and pink.