What are these things called that are sticking out of the corners of each node? Do they indicate the sex yet because they are not in the 12/12 cycle yet. I don't ever really remember seeing those things before except on a male or hermied plant.
They are stipules, sometimes called "spurs" and are on all mj plants. Not a sign of preflowers. The preflowers will show just above the stipules.
Peace!