Valerian, also called Garden Heliotrope, is a perennial flowering plant 3-5 feet in height. Flowers bloom in the late spring/summer and are white to pinkish and have a sweetish smell.
Valerian is where the drug “Valium” came from, it is a calming herb often taken as a tea and helpful for sleep, anxiety and nervous restlessness, for most people, however there are a small percentage of people that it does that opposite and gives them jittery energy. So try just a little bit first. The roots are used medicinally and they are often referred to as having a smell of “stinky feet”. The leaves, seeds & flowers are edible. Leaves have been used as a condiment and the flowers in salads as decorative edibles.
Valerian is wonderful as a cut flower and produces many seeds and will quickly populate an area (it’s also quite easy to remove and transplant).
As for using any medicinal wild plants, do your research!