This last page on the 'Thor Wild Cactus' answers the question of the symmetry of the flowers:
They are slightly zygomorphic.
White flower.
pink flower (pot number 1)
pink flower (pot number 1)
pink flower (pot number 2)
Unlike buds, the open flower is not pink.
The previous flower seen from another angle.
The article about the Thor Wild Cactus is finished.
Between the day of purchase of the plants in buds and the day of full opening of the flowers, about ten days passed.
_____________________________
I will finally show in the second chapter some monstrous Schlumbergera flowers, some ones are perhaps x Hatbergera.
__________________
_________________________________________