Rooibos, Rooibosch, or Redbush is possibly destined to become the health drink of the next decade. A Southern African shrub found growing wild in the Cape coastal mountains and harvested by the Khoikhoi people.
It is still harvested by traditional methods, cut with sickles, chopped up then placed in small heaps and sprinkled with water. As with ordinary tea, it oxidises and then takes on a deep red colour. The heaps are then spread out to dry.
It is high in antioxidants, well known for reducing the effects of ageing. It is caffeine free and low in tannin giving it a mild taste.
I would suggest that you brew for five minutes at 100oC although it is often brewed, almost stewed, for much longer.