One of my all around favorites is Maddog Skullcap (scutillaria lateriflora).
Medicinally, both leaves and flowers can be used for calming the nerves, insomnia, tremors, etc. It is an anti-spasmodic. My mate has epilepsy and she drinks the tea if she can detect pre-onset symptoms, and often times this can avert them. I use it because I am an insomniac. Sometimes I smoke it, too, for (reasons). Just don’t over use it; not good for your kidneys. As tea it tastes like greens, but a little acrid, and it may make your tongue tingle. Smoked it tastes odd, but nice, basically like tasting what a flower smells like. If you have ever taken opium you will know what I mean.
This is not a totally benign plant, so always check with a doctor before deciding to try it out.
These ones above are only about a month into the season here, but as they grow and bloom they make nice little purple flowers.
This is a good one for money magick and moon magick. Popular sources will say this is a water based Saturn correspondence, but I contend that it is water based Moon or Venus. Work with it and let me know what you think.
You can use it in oils and incense or in smudges for both moon magick and money magick, but honestly I think it is greatest for Lunar money magick, i.e. a money spell working with Lunar energies, especially full moon money magick.
It can be used to make a type of spell satchel to draw things from unexpected and benevolent sources, i.e. someone buys you a drink, or you get an unexpected tip. This one is only lore, though. I have not had too much luck with it myself.
I grew the mother plants from seed last year, but these can be found in North America near brooks, tree/field separations, and old farm land that is not used any more.
For transplanting a wild plant, take it in early spring if possible. These take root EXTREMELY well, so you only need to go down about 6"-8". This is one from my patch that I accidentally snapped it of just below the base while gardening. The plant grew this root ball from a snapped root in roughly 2 weeks, it is that virulent.
When you plant this in a garden you need to plan for space. The patch I showed takes up about 3 square feet, and that started from two plants I tucked in the corner last spring that were the size of the rooted cutting in the second picture. Highly invasive. It likes rich, well draining soil. If you have a lot of glacial till then you may want to prep the ground by pulling the rocks and improving the dirt. It can take full sun, but make sure to keep it watered well during the hot season.
For harvest, if you want to keep it around for next year, cut about 3 1/2" - 4" above the base and surround with a few inches of mulch, just like most perrenials. Harvest for optimal strength in the early morning ( before sunrise) and for strongest potency harvest when the little purple flowers are most vibrant.