Seeds and what to do with them

[Jtee]

I picked some Sabal palmetto seeds yesterday. I’d love to just throw them on the ground and let nature take it’s course but winter is coming and I doubt the seeds would germinate with nights in the 50’s now. It actually feels like fall this morning. 
I plan to store them in a paper bag until spring. 
I noticed when picking seeds that some will look old and be hollow and will crush between your fingers. Why is this, are they too ripe? I don’t want my seeds to turn into crispy nothing if I save them until next spring. Thanks. 

[PalmatierMeg]

They may be old. Not all flowers receive pollination so will produce fruit with with no or non-viable seeds. And there are types of weevils that lay tiny white eggs on Sabal fruits. Their larvae eat into the growing and/or fallen seeds, consume the endosperm, then drill their way out when mature. They leave an empty shell with a prominent hole.