My guesses are Eric Young (besseae x longifolium), Lutz Rollke (besseae x boisserianum), Robert Palm (besseae x czerwiakowianum), or the progeny of one of those; but you often seen a more prominent midrib on the petals of those primary crosses. Once you get out of the primary hybrids, it gets harder, but Stephen Manza (who sometimes pops up here), has a good collection of complex besseae hybrid photos on his website, slipperorchids.info .What is it’s natural spread? (Width - petaltip to petaltip)
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