Thalia (plant)
Thalia is a genus of six currently recognized species found in aquatic or marshy habitats, ranging in Africa from Senegal to Sudan to Zimbabwe, and in the Americas from Illinois to Argentina. Alligator-flag is a common name for plants in this genus. The generic name is in honor of Johannes Thal (1542–1583), a German doctor who wrote a Flora of the Harz Mountains. Cultivation. Semihardy in cultivation, it needs protection against frosts. It can be propagated by seed or division of the rootstock in the spring. Species. Species: