what trees are native to toronto?
['Ash. Black ash. Green ash. White ash.', 'Aspen. Balsam poplar. Large-tooth aspen. Trembling aspen.', 'Basswood. American basswood.', 'Birch. White birch. Yellow birch.', 'Beech. North American beech.', 'Cedar. Northern white cedar.', 'Chestnut. American chestnut.', 'Dogwoods. Alternate-leaved dogwood.']