m0useanswered grow question a year ago I agree its not a pollen sack / ball its a swollen calyx,
pollen sacks tend to be more pod or football shaped, smooth without trichomes, have no stigma "white hairs" and hang off of little stick pointing down.
This calyx is also pointing down and has a dried stigma but lacks the other characteristics of a pollen sack or "balls" as they are widely known.
Good Luck!