Just as the exquisite scent of the much-maligned Multiflora Rose has become the signature aroma of summer's beginning, so is the flower cluster of the much-beloved Sweet Pepperbush the source of the definitive perfume of mid-summer. Both scents are glorious, but the former comes from a highly invasive, "alien" species, while the latter is given forth by Clethra alnifolia, a wetlands denizen that's a native New Englander. I've been catching snatches of Clethra in the wind recently, but only this afternoon have my treks taken me past a particularly large stand of Summersweet—another appropriate common name—in full bloom. The bees were exceedingly happy. So was I.