I was given an orchid some time back and told it was a Cooktown Orchid, Dendrobium bigibbum. When it flowered turns out it didn't look like Cooktown Orchid at all. Never have been able to identify it so was hoping someone here could identify which Dendrobium it is, thanks.

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I put it up in a tree and it seems quite happy there. Only problem is it's a bit high and I have to get a tall ladder out to get any decent photos when it flowers.

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