Momordica angustisepala

Momordica angustisepala

Momordica angustisepala

Common Names: Narrow-sepaled Balsam-Apple, Wild Bitter Gourd
Local Names: Ejirin-nla (Yoruba, Nigeria), Ose Igbo (Igbo, Nigeria)
Species ID: NMP-108 |
wfo-0000376887 | NCBI_Taxonomy ID: 519332

Scientific Classification

Kingdom: Plantae

Phylum: Streptophyta

Class: Equisetopsida

Subclass: Magnoliidae

Order: Cucurbitales

Family: Cucurbitaceae

Genus: Momordica

Species: M. angustisepala

Authority: Harms

Synonyms: Momordica bracteata Hutch. & Dalziel

Morphological Description

Momordica angustisepala is a perennial, dioecious climbing herb in the Cucurbitaceae family, typically reaching 1–3 m in length:

·       Stem: Slender, angular, hairy, with tendrils for climbing; green when young, becoming woody at base (Fern, 2024).

·       Leaves: Alternate, broadly ovate to suborbicular, 5–12 cm long, 3–5 lobed, margins dentate, hairy beneath (Burkill, 1985).

·       Flowers: Yellow, unisexual; male flowers in racemes, female flowers solitary; petals 5, 1–2 cm long; blooming in wet seasons (Govaerts, 2024).

·       Fruits: Ovoid, 3–5 cm long, green turning orange-red when ripe, with narrow sepals; seeds flat, 8–10 mm long, encased in red aril (Fern, 2024).

Distribution and Habitat

Momordica angustisepala is native to tropical Africa, with a wide ecological adaptability:

·       Range: Nigeria, Ghana, Cameroon, Sierra Leone, extending to Central African Republic and Angola (Burkill, 1985; Govaerts, 2024).

·       Habitat: Lowland rainforests, montane forests (up to 1,500 m), forest edges, disturbed areas; thrives in full sun, well-drained loamy soils (Fern, 2024).

Ethnopharmacology

Momordica angustisepala is a lesser-known species of the Momordica genus, traditionally used in African herbal medicine for its antimicrobial, anti-inflammatory, antioxidant, and antidiabetic properties. Local healers use various parts of the plant, particularly the leaves and roots, to treat malaria, fevers, digestive disorders, wounds, and infections. It is also employed in managing diabetes and high blood pressure, with preparations often taken as infusions or decoctions. Phytochemical studies have shown the presence of flavonoids, alkaloids, saponins, and tannins, which are believed to contribute to its therapeutic effects. While traditional use supports a range of medicinal applications, scientific studies on Momordica angustisepala are still limited, and more research is needed to confirm its pharmacological potential and safety profile.

·       Abortifacient: Root extract in Nigeria; aqueous extract (0.8 mg/mL, 3.5–4 mL/kg) induced abortion in mice at all pregnancy stages, mimicking oxytocic action (Lutterodt, 1988).

·       Antipyretic: Leaf decoctions in Ghana for fevers.

·       Digestive Aid: Fruit pulp in Cameroon for stomachaches.

·       Antimicrobial: Leaf infusions in Nigeria for infections; chloroform extract inhibited Escherichia coli (MIC 0.5 mg/mL) (Akinyemi et al., 2005).

⚠  Toxicity Profile: Root extracts at high doses (>5 mL/kg) caused uterine overstimulation and potential toxicity in guinea pigs; use with caution in pregnancy (Aguwa, 1988).

Cultivation and Uses

·       Growth: Prefers full sun, well-drained soils; drought-tolerant, frost-resistant to -2°C; propagated by seeds (soaked 24 hours) or cuttings (Fern, 2024).

·       Non-Medicinal: Fruits occasionally eaten as famine food; stems used for rope in rural Nigeria (Burkill, 1985).

References

  • Akinyemi, K. O., Oladapo, O., Okwara, C. E., Ibe, C. C., & Fasure, K. A. (2005). Screening of crude extracts of six medicinal plants used in South-West Nigerian unorthodox medicine for antibacterial activity. Journal of Ethnopharmacology96(1-2), 49–55.
  • Burkill, H. M. (1985). The useful plants of West Tropical Africa (Vol. 1). Royal Botanic Gardens, Kew.
  • Fern, K. (2024). Momordica angustisepala. Useful Tropical Plants Database. Retrieved from http://tropical.theferns.info/viewtropical.php?id=Momordica+angustisepala
  • Govaerts, R. (2024). Momordica angustisepala. Plants of the World Online. Royal Botanic Gardens, Kew. Retrieved from https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:293391-1
  • Aguwa, C. N., & Mittal, G. C. (1983). Abortifacient effects of the roots of Momordica angustisepala. Journal of ethnopharmacology, 7(2), 169-173.

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Compounds of Momordica angustisepala
References

Shehu, A., Salami, L. B., Gbadamasi, A. A., Issa, S. B., Aliyu, M. A., Egharevba, G., ... & Hamid, A. A. (2019). Chemical composition from the leaf extracts of Momordica angustisepala with its antibacterial, antifungal and antioxidant activities. Nigerian Journal of Chemical Research, 24(2), 56-66.