I have what I thought at first was a Sumac (those type of leaves and pairings) - told no. Then I figured Angelica tree, again no. Now I have found a photo of the Tree of Heaven in Firefly Encyclopedia of Trees,edited by Steve Cafferty,pub.2005; page 234 Temperate Broadleaves. The photo on this page is very close to what my tree looks like. That would make it an ailanthus. My tree has bunches of flowers in a greenish yellowy shae in bouquets at middle of groups of small branches of leaves. Also later on these bunches of blowers turn to dark red or black berries that birds seem to love. I saw another enquiry within the forums of a person with a mystery tree of this sort from Ladysmith and a photo was posted with that one. Mine does not look at all like that. It is not a bush, but definitely a tree at least 15 ft tall, with spiny delicate branches and the leafy branches have thorns. It is prolific and is popping up all over the lawn if not controlled by pulling it out. It is growing in a grove of red cedars. Any help to id this tree would be much appeciated.