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Eucalyptus corrugata of the family Myrtaceae. Native to Western Australia and also known as rib-fruited mallee, this tree grows to 10 to 30 feet high and not particularly thick. I have never seen even pictures of the lumber, just the burl, which I believe is a root burl. I have never had a piece myself.
burl and closeup
burl pen blanks
top and bottom of a really beautifully executed burl bowl
burl bowl listed as corrugata, but to me this looks a LOT more like York gum burl
Although this bowl was listed just as corrugata, I have seen similar pieces labeled "gummy" corrugata