Hi, A friend receive these young plants (house plants?):

http://www.gogo.me.uk/temp/mystery_plant.html

Sorry the thumbnails are all screwed up but the actual images (when you
click on the thumbnail) look fine.
he was told it was some sort of ornemental cucurbitacae (squash,
pumpkin,...). But I really don't think so. At first it looked to me like
plants of the Solanacae family. Now, they start growing these big thorns
on the surface of the leaves. Possibly Datura? Any one has seen that before?

Many thanks for all suggestions.

Philippe