Thanks for the call Hetty.
My first impression was the same as Elaine's, a type of ginger. Having let my mind wander, it's telling me there is a resemblance to a narrow leaved Zantedeschia such as Z. rehmannii which is struggling.
http://www.thegardenhelper.com...
It would help to be able to see the 'bulb' or corm whichever it may be, while it's in growth it's best to leave it. If the leaves are yellowing, and if it's a Zantedeschia, they should eventually detach themselves from the bulb or corm rather than leave a dead stem attached to the 'bulb'.
