We have two or three species representative of this genus in Brazil, all of them with tiny greenish flowers. The showy ones are from Africa, like this Zairian Polystachya vulcanica. The plant is small, leaves semi-terete and non-resupinate flowers.
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Oh don't the day seem lank and long, when all goes right, and nothing goes wrong.
And isn't your life extremely flat, when you've nothing whatever to grumble at. W.S. Gilbert