Goldenrod

One common misconception about goldenrods is that they are a common cause of hay fever. This is not the case. Goldenrod is an insect-pollinated plant that produces very large and sticky pollen grains. Which is all the better to make sure insects come to feed on the pollen and that some gets stuck to the insect's body. This ensures that some of the pollen gets carried to other goldenrods, allowing cross-pollination. Because goldenrod pollen is so large, it doesn't get carried very far on the wind.
Goldenrods are extremely important to wildlife.

Bees, wasps, butterflies, moths, flies, and others visit for nectar and pollen. Caterpillars, aphids, and other small insects eat the leaves and stems. Wasps, spiders, praying mantids, lacewings, ambush bugs, assassin bugs, beetles, and birds prey on the insects Goldenrod attracts. There is even a Goldenrod Spider, who specializes in hiding on these plants! There are also special flies, called Gall Flies, which lay eggs in the stems and leaves of Goldenrod so their larvae can hatch and begin eating. Some insect predators, such as the Praying Mantis, lay their eggs on Goldenrod too, so their babies can feast on insects when they hatch.