what’s going on with my croton 😭

the thing im referring too is that very strange looking seedy thing in the middle of it. this is in a terrarium with whites tree frogs that wouldn’t lay anything like that, and there also aren’t insects in the tank that have ever laid anything like that before (maybe possibly crickets? i doubt it). i touched it gently with tongs and it feels hard and rough.

any help would be great 😭