Love burled bowls, vases, etc. Can I ask what trees the wood originated from?
Ah, should have posted that.
The bowl in first two photos is black cherry burl and the other piece is yellow birch with some spalting (fine black lines or other coloration caused by fungi) and a couple of small bark inclusions.
...or if you mean where do I source my wood, I live practically right in the middle of hundreds of square miles of national forest (mid-Atlantic region), so most of it's collected from downed trees and branches, etc. besides what I have on my own property (16 acres, probably 15 tree species) and what's given to me occasionally. Just a few miles from here is a somewhat isolated road through a stretch of national forest with a lot of cherry trees and hundreds burls on them, so I scout it for downed trees a few times a year. There's another, similar area about an hour from my place, I get there maybe once or twice a year.