For example, with the Indian Mallow, the Wiki entry says: various parts of the plant are used as a demulcent, aphrodisiac, laxative, diuretic, sedative, astringent, expectorant, tonic, anti-convulsant, anti-inflammatory, anthelmintic, and analgesic and to treat leprosy, ulcers, headaches, gonorrhea, and bladder infection.The whole plant is uprooted, dried and is powdered. In ancient days, maidens were made to consume a spoonful of this powder with a spoonful of honey, once in a day, for 6 months until the day of marriage, for safe and quick pregnancy. (what is a quick pregnancy? One in which the baby comes to term in 6 months?)
The plant is very much used in Siddha medicines.
The seed pod:
The root, bark, flowers, leaves and seeds are all used for medicinal purposes by Tamils. The leaves are used as adjunct to medicines used for piles complaints. The flowers are used to increase semen in men, too(though it's not clear how it is to be ingested).
So do look at the wildflowers and "weeds" at your feet...you might find something quite interesting...and useful!