Fir seeds — pine cones?
I think the seeds are in the pine cones.
The fir seeds can lie dormant in their cones in the forest floors for years. But extreme heat, like a fire will cause the seeds to pop out. You can put a Douglas fir cone on your grill, fire it up and watch this happen. This proves fire is essential to a forest and always has been. You don’t need to be a scientist to recognize common facts and sense. This was a well-written article.
The seeds are located in the pine cones. When the pine cones get toasted in a fire, the increased heat starts the germination process of the seeds located in them.
Get any pine cone and pound it on the table...you should see the seeds drop free.