if you google images some come up. they look a bit like to a white grape hyacynith flower.

I have just had a look and I agree with sbg ''' if you type in www.tuinplantonline.nl/ then click the top choise begining tuinplanten, a page will come up with your plant name on the top of the list click on the name and a picture will come up, and all the info if you speak german it would not translate for me but at the begining of all this it gives you a chanch of a translation if you are luckie