First is Common Tansy (Tanacetum vulgare). It has a long history being used medicinally. It escaped cultivation in the US as early as the 1600's. It has a
root system that stays in the top two feet of the soil and spreads by rhizomes as thick as 3/4". The fern-like leaves have a distinctive smell, kind of like camphor. It lives between 3 and 10 years, depending on moisture at the site. Tansy has been used to treat intestinal worms, reduce fevers, preserve meats, and as an insect repellant. If growing near potatoes it has been shown to reduce the number of colorado potato beetles.
The second photo is a violet (genus Viola) that is growing near the wofati.
The third photo is Common Yarrow (Achillea millefolium). It has been blooming forever, and i was finally able to get a decent photo of it. Yarrow leaves are also very aromatic, smelling similar to chrysanthemum. It is said to attract predatory wasps. It has
deep roots that pull minerals from the subsoil and make it drought resistant. Yarrow has long been applied to wounds to stop bleeding. It has also been used to relieve pain and reduce fevers. The young leaves are edible and can be cooked like spinach. Basically, it has a million uses and you should find/grow some. Prolonged use can increase photo-sensitivity of the skin, so don't overdo it.