A friend just gave me a glass bowl which was a table centerpiece from a banquet. It contains two orchids sitting in water with pebbles. I haven't lifted them out yet, so I don't know if they have any stem at all, but the pebbles are only about 2 in deep. Assuming there's a bit of stem, can orchids be kept alive this way? Here's a link to a photo. Yes, that's an artichoke at bottom left. Crazy florist!