If you live in the American south, you might notice holly trees blossoming in May or June. Last week I sat on the grounds of the National Academy of Sciences in Washington DC, and breathed in the scent of a flowering tree. The holly blossom has a very sweet smell with enough of an edge to keep it from being cloying. If perfumers have not bottled this, they should think about it. It is a scent that flows through the air, and it makes me look for the tree when I smell it, the way I’ll look for magnolia blossoms or roses. The tree outside my building has started to blossom this week and I’m looking forward to smelling its perfume for as long as it lasts. Check out the hollies in your neighborhood. You might discover what that lovely scent is that you’ve been noticing.