Skip to content

Your account

With an account, your progress (modules read, XP, badges, cards, notebook, pack, challenges) follows you on every device. Without one, it stays in this browser.

or
Harmless🍽️ Edible💊 Medicinal

🌺 Hibiscus (roselle, bissap)

Hibiscus sabdariffa · Malvaceae

🌴 Tropical🌍 Africa
🧠 To remember it“The red calyx of bissap calms blood pressure, not thirst”—a tangy, refreshing drink rather than a baseline therapy.
Hibiscus (roselle, bissap) — Hibiscus sabdariffa

🔍 Identify it without mistakes

Annual shrub with reddish stems, deeply lobed leaves (3-5 lobes) green to purple depending on the variety, and pale yellow flowers with a purple center. After flowering, the calyx (base of the flower) swells and turns bright red: this fleshy, tangy structure is harvested—not the fruit itself.

  1. fleshy bright red calyx surrounding a dry capsule after flowering
  2. lobed leaves with reddish veins
  3. stem often tinged with red
Size1-2.5 m
Floweringsummer-autumn depending on climate, calyces harvested 3-4 weeks after flowering
Habitatcultivated throughout sub-Saharan Africa, South Asia, and the Caribbean, well-drained soils, full sun

⚠️ Not to be confused with

No known dangerous look-alikesaucun

To tell them apart: the bright red, star-shaped fleshy calyx that swells around the dry capsule after flowering is a unique structure to roselle hibiscus among cultivated tropical shrubs

🍽️ Eating it

Partsfleshy calyces (fresh or dried), young leaves (leaf vegetable), seeds (roasted)
Season3-4 weeks after flowering for calyces
Tastetangy, similar to cranberry or sorrel for the calyx; mild and acidic for the leaves

Preparation : fresh calyces steeped in hot water (bissap/karkade drink) or cooked into jam/tangy sauce; young leaves cooked like a green vegetable (flavor close to sorrel)

💊 Healing with it

infusion of calyces traditionally used for mild to moderate hypertension; clinical trials show a reduction in systolic blood pressure comparable to that of mild antihypertensive medications

Level of evidence : solid studies — Journal of Nutrition (clinical trial); Nutrition Reviews meta-analysis 2022

⚠️ not recommended for pregnant women (reported emmenagogue effect) and to be discussed with a doctor if currently taking antihypertensive treatment (risk of potentiation/interaction); does not replace prescribed treatment

🪓 Other bushcraft uses

  • stem fibers used as a jute substitute (kenaf, related species)
  • natural red food coloring for drinks and confectionery
Sources (2)

No entry replaces a certain identification in the field, or medical advice. When in doubt: don't eat it. If ingestion is suspected: poison control or 112/911.