From late may to early June  these frothy blooms decorate many a winding country path. Many compounds come together to create the scent of elderflowers; cis-rose oxide (unsurprisingly also found in roses), hotrienol, nerol oxide, and nonanal. Linalool and alpha-terpineol (both of which contribute to the floral aspect of the aroma), and hexanal and (Z)-3-hexenol (which add a grassy aspect).