Blue Ash Fraxinus quadrangulata
Family: Oleaceae (Olive)
Branching: Opposite

This ash is rare in Canada.  Its twigs are very distinctive as they have four ridges running down the twig, giving it a square look.   

The angled twigs of Blue Ash.

Another view of the winter twig

Winter twig of Blue Ash

Lateral bud and leaf scar

Middle-aged bark

Older bark of Blue Ash

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copyright 2008 Josh Sayers
please email me with any questions, comments, or errors