Hibiscus or bissap flowers (dried) or Zobo leaves

The hibiscus sabdariffa L. (Roselle) has little in common with our native garden hibiscus. It is a fast-growing plant with an appearance more reminiscent of a thin-stemmed grass. Once the flower has wilted, the calyx swells to five times its size. 

It acquires a juicy, fleshy taste. The calyxes are only removed when the fruit is ripe. Whole flowers are not used for tea, only the calyxes. The hibicus flower is consumed as a hot and cold infusion.