Refreshing hibiscus mint herbal iced tea recipe with key-lime ice cubes. Hibiscus, also called roselle, is made from the calyces (sepals, part of the flower) of Hibiscus sabdariffa in the Mallow family (Malvaceae). High in anti-oxidant bioflavanoids, Hibiscus has been the study of many recent studies for its anti-inflammatory, cardio-protective, neuroprotective, and hepatoprotective qualities. It is a good tonic tea for folks with heart disease or high cholesterol, and as a general preventative against free radical stress on the body.