What are those strange looking balls with 1 filament/pistil?

Those are calyxes, same things that plump up around pistils that make up buds. You know it's a female if it has the whispy white projection. They'll show in vege, if given enough time. I wouldn't recommend doing this, but when those things are all plump and crystalized, they'd pack a good bowl for sure long before any buds are ripe in bloom. (not vege).. don't mutilate your plant like that in bloom, but it would be stoney.

Hey gardener! One or two pistils still indicate a female as long as you don't have any male flowers, everything is fine. The pistils oxidize with age and eventually all turn brown at some point. Besides age, pistils can turn brown for many reasons like too much humidity, water falling directly on them, or even too much wind. Good luck bella ciao!

Hi! The balls with hairs are called calyx and if im not mistaken when the calyx gets pollinated the other pistil goes inside the calyx and they change color. Stress and touching can also do the same but if I were you I would check for some balls if there is some pollen somewhere..