Quote[/b] (Rob-Rah @ May 31 2005,5:26)]U. humboldtii grows long thin leaves when young, changing to the normal paddle-shaped ones as it gets odler.
U. praelonga produced both types of leaves at the same time all the way through its life. Round/spatulate ones at ground level and long thin ones up into the air. Grow it in live LFS, stand in water all year long, subject to direct sunlight and allow to get cold (down to freezing) in winter and you ought to get the large yellow flowers in spring-summer.
Cheers.