Crinum thaianum
Sean Zera (Thu, 31 Jan 2013 09:30:21 PST)

Known in the aquarium trade as Water Onion, or even more cryptically as
Onion Plant. Poking around some aquarium sites just now, I was intrigued to
see *Zephyranthes candida* being grown completely submersed, sold as "Dwarf
Onion Plant".

Sean Z