red maple

sugar maples have three lobes (like the flag) while Norway maples have five lobes with pointy, tapered tips.

Viking maples invade Canada

Stephen Westcott-Gratton

The widely planted Norway maple (Acer platanoides) is native from Scandinavia to Turkey, but imported to Canada and now an invasive species.

Allergy-free gardening

Karen York

If you wheeze and sneeze when you set foot in the garden, just think about sex — plant sex, that is. Tips on how to make an allergy-free garden.