# Hibiscus
**Hibiscus** is a genus of flowering plants in the mallow family, [Malvaceae](https://www.edgepedia.org/malvaceae), subfamily Malvoideae and tribe Hibisceae, comprising roughly 438 species of herbs, shrubs, and trees distributed across tropical and temperate regions[1](https://pmc.ncbi.nlm.nih.gov/articles/PMC13224631/). The genus was first published by Linnaeus in *Species Plantarum* in 1753 and is a conserved name (nom. cons.)[2](https://powo.science.kew.org/taxon/urn%3Alsid%3Aipni.org%3Anames%3A328182-2). Its species carry considerable economic and cultural weight, with prominent roles in horticulture, agriculture, and the food and pharmaceutical industries[1](https://pmc.ncbi.nlm.nih.gov/articles/PMC13224631/).
| Key fact | Detail |
|---|---|
| Classification | Malvaceae, subfamily Malvoideae, tribe Hibisceae[1](https://pmc.ncbi.nlm.nih.gov/articles/PMC13224631/) |
| Species count | Approximately 438 species (one recent estimate); Kew's *Plants of the World Online* treats it as a genus of about 200 species[1](https://pmc.ncbi.nlm.nih.gov/articles/PMC13224631/) • [2](https://powo.science.kew.org/taxon/urn%3Alsid%3Aipni.org%3Anames%3A328182-2) |
| Native range | Tropics and subtropics, with a few temperate species[2](https://powo.science.kew.org/taxon/urn%3Alsid%3Aipni.org%3Anames%3A328182-2) |
| Diagnostic features | Showy flowers with a staminal column about equal in length to the petals, anthers over at least half the column, and 5-locular capsular fruit with a papery exocarp[3](https://powo.science.kew.org/taxon/urn%3Alsid%3Aipni.org%3Anames%3A328182-2/general-information) |
| Habit | Shrubs and trees, rarely herbs, up to 15(–30) m in some floras[3](https://powo.science.kew.org/taxon/urn%3Alsid%3Aipni.org%3Anames%3A328182-2/general-information) |
| Best-known crop | Roselle (*Hibiscus sabdariffa*), grown for its fleshy calyces used in teas, drinks, jams, and food coloring[4](https://njaes.rutgers.edu/fs1298/) |
| Taxonomic status | Polyphyletic as currently circumscribed; several allied genera are nested within it[1](https://pmc.ncbi.nlm.nih.gov/articles/PMC13224631/) |
## Description
Hibiscus species vary widely in form. Flora treatments describe them as annual or perennial herbs, subshrubs, shrubs, or small trees, with stellate or sometimes simple hairs; in [New Guinea](https://www.edgepedia.org/new-guinea) some species reach 15(–30) m[3](https://powo.science.kew.org/taxon/urn%3Alsid%3Aipni.org%3Anames%3A328182-2/general-information). Leaves are simple and petiolate, sometimes three-lobed, with dentate margins and usually palmate venation; extrafloral nectaries are sometimes present on the leaf underside[3](https://powo.science.kew.org/taxon/urn%3Alsid%3Aipni.org%3Anames%3A328182-2/general-information).
The flowers are bisexual, actinomorphic, and five-merous, usually solitary in leaf axils or in few-flowered fascicles. An epicalyx of 3 to many bracts, usually free, sits outside the five-lobed calyx, which persists in fruit. Petals are often showy, frequently yellow with a dark center, though red, pink, purple, and white also occur. The staminal column usually equals the petal length and carries numerous anthers over at least half its length; the superior ovary is five-locular with five style branches and capitate stigmas[3](https://powo.science.kew.org/taxon/urn%3Alsid%3Aipni.org%3Anames%3A328182-2/general-information). The fruit is a five-locular capsule with a papery exocarp, containing several reniform seeds per locule[3](https://powo.science.kew.org/taxon/urn%3Alsid%3Aipni.org%3Anames%3A328182-2/general-information).
## Taxonomy and the polyphyly problem
Classification within Hibiscus has remained difficult at multiple levels. At the species level, high morphological variation and occasional hybridization complicate species delimitation; at the sectional level, morphology-based subdivisions conflict with molecular phylogenies, producing inconsistent circumscriptions among studies[1](https://pmc.ncbi.nlm.nih.gov/articles/PMC13224631/). At the generic level, molecular evidence shows that Hibiscus is polyphyletic: species of allied genera such as *Abelmoschus*, *Malvaviscus*, *Kosteletzkya*, *Urena*, *Kydia*, and *Cenocentrum* are nested within it, indicating unresolved intergeneric relationships within tribe Hibisceae[1](https://pmc.ncbi.nlm.nih.gov/articles/PMC13224631/). A 2005 study by Pfeil and Crisp found that genera from three tribes, Decaschistieae, Hibisceae, and Malvavisceae, are nested within Hibiscus[5](https://doi.org/10.1071/SB04024).
Chloroplast genome phylogenies reinforce this picture. Complete plastome analyses confirmed Hibiscus polyphyly and recovered major clades named /Phylloglandula, /Trionum, and /Euhibiscus, with *Hibiscus volkensii* showing a long branch suggesting a distinct evolutionary trajectory; *Thepparatia scandens* appeared as sister to *Hibiscus verdcourtii*, and Hibiscus sect. Bombicella was confirmed to be polyphyletic[1](https://pmc.ncbi.nlm.nih.gov/articles/PMC13224631/). A related analysis supports four main clades, /Phylloglandula, /Trionum, /Euhibiscus, and /Calyphylli, as originally proposed by Pfeil and Crisp[6](https://link.springer.com/article/10.1186/s12870-026-08791-5).
**Proposed resolutions.** Pfeil and Crisp outlined three ways to handle the polyphyly: broadly circumscribing Hibiscus to include all embedded genera, splitting it into multiple smaller monophyletic genera, or accepting Hibiscus as paraphyletic, with a hybrid approach also suggested[6](https://link.springer.com/article/10.1186/s12870-026-08791-5). They argued that including over 200 species from several genera within a broadly defined Hibiscus causes fewer nomenclatural changes overall than alternative schemes[5](https://doi.org/10.1071/SB04024). Later work concludes that monophyly within Hibiscus and Hibisceae may be achieved through phylogeny-based generic delimitation rather than morphology-based classification, whether by broadening or splitting the genus[6](https://link.springer.com/article/10.1186/s12870-026-08791-5). After several taxonomic revisions, Hibisceae itself has been resolved as monophyletic, though discrepancies remain over the number and boundaries of genera within the tribe[1](https://pmc.ncbi.nlm.nih.gov/articles/PMC13224631/). A 2024 phylogenetic study of the tribe, including five rarely sampled genera and 137 previously unsampled species, introduced a new classification for the tribe and clarified the boundaries of Hibiscus and *Pavonia*[7](https://commons.emich.edu/fac_sch2024/50/).
## Uses
Several species are popular ornamentals, and the genus is frequently cultivated for ornament, hedges, and fiber production[3](https://powo.science.kew.org/taxon/urn%3Alsid%3Aipni.org%3Anames%3A328182-2/general-information).
**Roselle.** *Hibiscus sabdariffa*, known as roselle, Jamaica sorrel, karkadeh, bissap, or zobo among many other names, is an annual or perennial shrub grown as a major cash crop in China, Sudan, and Thailand[4](https://njaes.rutgers.edu/fs1298/). Two major strains exist: var. *altissima*, important for high-quality fiber, and var. *sabdariffa*, important for food uses[4](https://njaes.rutgers.edu/fs1298/). The fleshy calyces are used for tea, jam, jelly, juice, wine, syrup, flavoring, and coloring; in parts of India the leaves are eaten like spinach, and in Senegal dried calyces are processed into a beverage considered highly therapeutic[4](https://njaes.rutgers.edu/fs1298/). The United States imports approximately 5,000 metric tons of dried roselle calyces annually for use in brewing herbal teas[4](https://njaes.rutgers.edu/fs1298/). The leaves, calyx, and flowers are rich in pigments, especially anthocyanins, and antioxidants, and are high in iron, magnesium, and vitamins A and C[4](https://njaes.rutgers.edu/fs1298/).
**Medicinal research.** Hibiscus preparations have been studied for antihypertensive effects. In studies of its hypotensive effects, participants took either a water infusion made from 10 g of dried *H. sabdariffa* calyx, containing 9.6 mg of anthocyanins per dose, or a dried-calyx extract supplying 250 mg of total anthocyanins daily, each for 4 weeks[8](https://www.drugs.com/npp/hibiscus.html).
## Distribution and ecology
The native range of the genus is the tropics and subtropics, with a few temperate species; Kew lists occurrences across Africa, the Americas, Asia, and Oceania, from Afghanistan and Argentina to China, India, Madagascar, and New Guinea[2](https://powo.science.kew.org/taxon/urn%3Alsid%3Aipni.org%3Anames%3A328182-2). In New Guinea, Hibiscus occupies a wide variety of habitats, from lowland rain forests and open vegetation with a strong dry season to moist riverbanks[3](https://powo.science.kew.org/taxon/urn%3Alsid%3Aipni.org%3Anames%3A328182-2/general-information). Several species have been introduced into cultivation from other parts of the world or from the wild[3](https://powo.science.kew.org/taxon/urn%3Alsid%3Aipni.org%3Anames%3A328182-2/general-information).
## References
1. [Comparative chloroplast genomics of Hibiscus (Malvaceae) and its phylogenetic implications, BMC Plant Biology](https://pmc.ncbi.nlm.nih.gov/articles/PMC13224631/)
2. [Hibiscus L., Plants of the World Online, Kew Science](https://powo.science.kew.org/taxon/urn%3Alsid%3Aipni.org%3Anames%3A328182-2)
3. [Hibiscus L. general information, Plants of the World Online, Kew Science](https://powo.science.kew.org/taxon/urn%3Alsid%3Aipni.org%3Anames%3A328182-2/general-information)
4. [Ultra-Niche Crops Series: Roselle (Hibiscus sabdariffa L.) Production and Marketing in New Jersey, Rutgers NJAES](https://njaes.rutgers.edu/fs1298/)
5. [What to do with Hibiscus? A proposed nomenclatural resolution for a large and well known genus of Malvaceae, Australian Systematic Botany 18(1): 49–60 (2005)](https://doi.org/10.1071/SB04024)
6. [Comparative chloroplast genomics of Hibiscus and its phylogenetic implications, BMC Plant Biology](https://link.springer.com/article/10.1186/s12870-026-08791-5)
7. [Phylogenetic relationships within tribe Hibisceae (Malvaceae) reveal complex patterns of polyphyly in Hibiscus and Pavonia, Hanes, Blanchard et al.](https://commons.emich.edu/fac_sch2024/50/)
8. [Hibiscus Uses, Benefits & Dosage, Drugs.com](https://www.drugs.com/npp/hibiscus.html)
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*Topic: Encyclopedia › Life and health › Plants and algae › Seed plants › Other flowering plants › Nonmonocot genus-plus-species treatments*
*Initially written Sep 17, 2026 · Reviewed: Oct 21, 2026 · Edited: Oct 15, 2026; Oct 21, 2026 · Last review: Oct 21, 2026*
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License: Edgepedia Community License 1.0, https://www.edgepedia.org/edgepedia/license