blue ash

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Derived from the black dye extracted from the tree's inner bark through immersion in water.

blue ash (plural blue ashes)

1. Any of species Fraxinus quadrangulata of ash trees native primarily to the Midwestern United States, as well as the Bluegrass region of Kentucky and the Nashville Basin region of Tennessee.

• blue ash tree

• Blue Ash

• blue ash on Wikipedia.Wikipedia
• Fraxinus quadrangulata on Wikispecies.Wikispecies
• Fraxinus quadrangulata on Wikimedia Commons.Wikimedia Commons

• ale-bush