Epiphytic jungle cactus, tentatively Epiphyllum sp . This specimen was brought to us as one which could be rubbed onto sore muscles. I did not think much of it at the time. However, upon examining literature at home, it appears that the Kofan employ a similar species exactly the same way. Coming from linguistically incompatible tribes 1500 km.
Mexican species contain steroids.
Perhaps an anti-inflammatory agent is contained in this specimen which now graces the entryway to our home.