The Crypts Pages - Plenty of information on the botany, habitats, cultivation and taxonomy of plants of this genus. - http://www.nationaalherbarium.nl/Cryptocoryne/index.html
Cryptocoryne - Information from Wikipedia on this genus of about 50 aquatic species, commonly known as the Water Trumpet, some of which are used as aquarium plants. - http://en.wikipedia.org/wiki/Cryptocoryne
Cryptocoryne Species - Images and notes on use in aquaria. - http://www.thekrib.com/Plants/Plants/crypts.html