I was surprised to see this weed, being cultivated in the herbal garden at Hamilton Gardens, I supposed that it might have been used medicinally in the past, so I googled it. This is what I got
Queen-Anne’s-lace belongs to the carrot family (Umbelliferae) and contains beta-carotene and other properties that are used to treat bladder and kidney conditions. Also known as wild carrot, Queen-Anne’s-lace grows taller than today’s cultivated carrots and the stalks are rougher. The 17th-century herbalist Nicholas Culpeper believed the roots to be “small, long and hard and unfit for meat, being somewhat sharp and strong.”
Nonetheless, early Europeans cultivated Queen-Anne’s-lace, and Romans ate it as a vegetable. American colonists boiled the taproots, sometimes in wine. They also mixed the leaves with honey and applied the poultice to sores or ulcers, to help heal and kill bacterial infections. Settlers also used the herb as a source of orange dye.
The seeds of Queen-Anne’s-lace have their own benefits. They are nearly flavorless and can be added to foods to help prevent flatulence. Historically, they were used as a form of contraception.
I have heaps of the stuff in our paddock. Now I know what to do with it!