水鬼蕉属（学名：Hymenocallis）是石蒜科下的一个属，为多年生草本植物。该属共有50种，分布于美洲。

Hymenocallis /ˌhaɪmᵻnəˈkælɪs/ (US) or /ˌhaɪmɛnoʊˈkælɪs/ (UK) is a genus of American plants in the amaryllis family.

Hymenocallis contains more than 60 species of herbaceous bulbous perennials native to the southeastern United States, Mexico, Central America, the Caribbean, and northern South America. Some species are cultivated as ornamentals in warm nations around the globe, and a few have become naturalized in parts of Africa and on various tropical islands. Many of the species from the Caribbean and from the southeastern United States inhabit wet areas such as marshes, streambanks, and seashores. Some species even have floating seeds. Some of the Mexican species, in contrast, grow on grassy slopes in hills and mountains.