Excuse me, what is this?

Been smoking a half over the last few days and got to the bottom of the bag to find the last few buds like this. Didn't notice until after smoking a few. Still gets me baked and doesn't taste / smell any difference hence not noticing straight away.

I'm assuming it's some kind of mold but my crap phone can't get that much detail so was hoping some experts could confirm my fear please or settle my paranoia?

Live in south-west England, always store in airtight jars / bags and never had an issue with this before but thought this would be worth mentioning.

Any help is appreciated, thank you fellow stoners and have a lovely weekend!