I thought of Goldenrod as a sinister figure in the hay fever department, but apparently the pollen that causes allergy problems is mainly from Ragweed, which blooms at the same time but is pollinated by the wind. Goldenrod pollen is too sticky and heavy for wind pollination so it relies on insect pollination. They are popular garden plants in Europe, and roadside weeds here. It contains rubber, and Thomas Edison experimented with making goldenrod a practical domestic source of rubber. Aster Family.
Goldenrod (Solidago altissima)