Looks like mycelium, but even if you put it under a microscope, there will be painfully little to get a species ID from. About all you can do is look for
clamp connections and see if that narrows it down any. Fungi are best identified by their fruiting bodies (mushrooms), then by microscopic study of spores, but when all you have is a tangle of mycelia, you're pretty much SOL.
And it's not a silly idea. If you plant those cones in some rich dirt, you could get germination and then next spring when the weather warms up, you have a seedling that is already pre-inoculated with its mycorrhizal partner and both are ready to grow like a weed.