Wait, so if I cut those Silverwoods down, the nodes stay with the wood blocks and don't remain in place where they were? That's not how I remember it being, but pretty sure I'm remembering Thaumcraft 3 and that's like ancient history now.
Since I need the wood for vis filters, I have been selectively cutting down Silverwoods that don't have nodes in them, that's how come I don't know the answer to this. I've been "saving" those trees for in the future, when I finally do know what to do with them, and what to do with the nodes. Seems like nodes aren't used for very much, I've almost got my wand recharge station completed with just your everyday normal nodes (the ones that didn't go pale on me but stayed normal). Is a pure node from a silverwood tree going to be of any use to me?