Woah man. That is weird as shit. It looks like skinny leaves forming flower clusters. They almost look like pistils but they...aren't. I don't know dude....how many are flowering? Do all the ones flowering look like that? I forgot, what strain are they..are they all the same? From seed?
Damn dude I wish I could say something helpful but I don't know what you could do about it no matter what besides watch and wait. What if anything are you feeding them?
I remember seeing someone germinate some seeds one time and the tap root was made of leaf, stem, and root tissue. Undifferentiated somethingorother tissue something is what the dude called it....some sort of mutation. IIRC the plants died in seedling stage though so I doubt its the same thing...but it seems like a mutation of some sort. From what I understand mutations can be genetic or caused by a disease. If your seeds aren't 'related' and more than one plant is affected I would guess it to be some sort of a environmental mutation caused by.....idk
Sorry to ramble man...good luck finding out...hope everything turns out well
...and I didn't really get what canafan was saying either. Kind of like when I go to my chiropractor and tell him my back hurts....he feels on my head and then tells me it was something I ate