Name That Plant

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This is a pretty unusual plant that I've had for some years now. The leaves are so thick, they remind you of beaver tails. The leaf in the pic on the left is roughly 8" long and 4 and a half inches wide. My plant has bloomed three times now and it takes at least 4 or 5 months from the time the buds first appear, until they open. The buds remind you of jingle bells and when they finally do open, (and this is the widest they open) the flower falls off in the next day or two. Each of the four petals is very fleshy and thick; much thicker than the leaves. There were three buds; the first flower took over 4 months to open and it may be another month till the others open.

Can't remember where I got it and several times I've tried to search the Internet to no avail. The leaves make me wonder if it's a succulent and the buds are so slow to open; could it be in the orchid family ?

If you know what this plant is please leave a comment. And it'd be interesting to know why the flowers fall off so quickly after having taken months and months to open.

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