Hi Rudolf, thank you. There are two plants in this pot, but the three flowers come from the same plant, and the third that you don't see from the front has the same anomaly. I've had this plant for years and this is the first time I've noticed this...Sylvain, P. thaianum is always a great sight and so is yours.
Are these two flowers with the staminode covered by the inside rim of the pouch of the same plant ?