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IwannagethighOG
I remember budgreenleaf, I think it was him had some worled phylotaxy shots of his Bluexnl on Overgrow. Damn I wish I still had that shot. It was like an octopuse.
I have seen it many times. What I saw was not two plants fused together, it was one plant where the main stem flattened out and may or may not split.
It is called faciation, I have seen it many many times. I have a clone of one, it grows normal until a few feet tall then the main stock flattens out, I have grown them 10 feet tall, I still have the flatened out 10 foot stem. To maintain the clone just take any non-faciated branch and clone it, grow it out and it will flatten out. It offers no benefit as the buds are not as good, smaller bracts, less resin etc.
I have never seen a male plant do it. Unlike whorled phyllotaxy with three stems instead of two on the main stock, they seem to be linked with males mostly.
-SamS