Sea Grapes seem, to me, to grow all over St Thomas.
They're called Sea Grapes because they produce clusters of fruit that look like grapes. Though they are edible, unless they are really ripe, I would't recommend trying to pick and eat them.
They are very atmospheric on the beach. The trunks can be gnarled and really very interesting.
Sea Grapes have roundish leaves. At some times during the year the trees/bushes they die off a bit - I don't think they actually lose all their leaves. The leaves, before they fall, will turn a very vibrant red. I thought it would be an interesting subject for an iPad Painting.