If you wander the verdant grounds of Van Dusen Botanical Garden over the next couple of months, you'll encounter more than just beautiful flowers and trees. You'll also come across more than two dozen wooden sculptures and installations, scattered throughout the garden. The exhibition is called "Touch Wood
," and it opened earlier this week. Celia Duffy, the curator of the event, gave Margaret Gallagher a preview. You can hear their conversation after the 7:30 am news this Saturday.