A few major studies have found a link between this cancer and talc, but none have proven causation. Also, these studies haven't shown a link between just how much talc is used and how it affects the risk of ovarian cancer. This just makes things more confusing.
Rush, any of several flowering plants distinguished by cylindrical stalks or hollow, stemlike leaves. They are found in temperate regions and particularly in moist or shady locations. The rush family (Juncaceae) includes Juncus, the common rushes, and Luzula, the woodrushes. Common rushes are used in many parts of the world for weaving into chair bottoms, mats, and basketwork, and the pith serves as wicks in open oil lamps and for tallow candles (rushlights).
The names scouring rush and horsetail apply to plants in the genus Equisetum, a primitive group known for their bizarre appearance and invasive habits. Field horsetail (Equisetum arvense) and giant horsetail (Equisetum telmateia) blight pastures. The reason that scouring rush and horsetail are so difficult to kill is that they have persisted for millennia and adapted to climates all over the world.