Vallisneria spiralis ‘Tiger’ is named due to its striped leaves. It has quite short thin leaves which grow to around 30cms tall, this make it perfect for small a quariums such as Avo. The leaves are narrow so is is suitable for planting next to smaller plants because it won’t block out the light.
http://ridgewayfriends.org.uk/photo album/membersphotos/MembersPhotographs/walkfrommoulsfordtoaldworth1.html Height: 30cm
http://advancedgastroonline.com/faq-ibd-colon-cancer/ Position: Background, Midground