close-up of intact crimson red calyces on a roselle plant, hibiscus sabdariffa, and defocused leaves

roselle rosella botany botanical agriculture commercial production dark red leaf juice tea infusion boiled drink herbal flower flowering calyx calyces chin baung ywet jam preserved fruit anthocyanins sepal vitamin fresh freshly harvested hibiscus sabdariffa vegetable bast folk medicine infused fiber harvest cut flora floral vegan nature natural nutritious nutrient close-up intact crimson plant defocused leaves species native africa used rich consumed africa jam crimson nutritious nutrient