USTC Pharmacy Medicinal Garden

University of Science and Technology Chittagong (USTC)

USTC Pharmacy Medicinal Garden

আকন্দ (CALOTROPIS GIGANTEA)

ORIGIN

Calotropis gigantea is native to South Asia and Southeast Asia, including Bangladesh, India, Sri Lanka, Myanmar, Thailand, and Indonesia. It naturally grows in dry, open landscapes and has spread widely across tropical and subtropical regions due to its high environmental tolerance.

TAXONOMY

  • Kingdom: Plantae

  • Clade: Angiosperms → Eudicots

  • Order: Gentianales

  • Family: Apocynaceae

  • Genus: Calotropis

  • Species: Calotropis gigantea (L.) Dryand.

The plant belongs to the milkweed subfamily and is closely related to Calotropis procera.

EVOLUTION

Calotropis gigantea evolved adaptive traits such as milky latex, toxic secondary metabolites, thick leaves, and deep roots, enabling survival in arid and disturbed habitats. These traits provide protection against herbivores and environmental stress, reflecting evolutionary specialization within the Apocynaceae family.

DESCRIPTION

Calotropis gigantea is a perennial shrub or small tree, usually 2–4 meters tall.

  • Stem: Woody, branched, containing milky latex

  • Leaves: Large, opposite, ovate, thick, gray-green

  • Flowers: Showy, waxy, star-shaped; white, lavender, or bluish-purple

  • Fruit: Inflated follicle containing flat seeds with silky hairs for wind dispersal

ECOLOGY

The plant thrives in dry, sandy, saline, and degraded soils.

  • Highly drought-resistant

  • Pollinated mainly by insects

  • Seeds dispersed by wind

  • Acts as a pioneer species in disturbed ecosystems

CULTIVATION

Calotropis gigantea is rarely cultivated intentionally but grows easily when required.

  • Propagation: Seeds or stem cuttings

  • Climate: Hot tropical to subtropical

  • Soil: Poor, sandy, or alkaline soils

  • Water requirement: Minimal

It requires little maintenance and is highly resilient.

TRADITIONAL USES

Traditionally, Akanda has been used for:

  • Heating leaves and applying them to swollen joints and body pain

  • Using flowers in religious rituals, especially in Hindu worship

  • Fibers from bark used in making ropes and stuffing materials

MEDICINAL USES

In traditional medicine systems (Ayurveda, Unani, folk medicine):

  • Latex used externally for warts, corns, and skin diseases

  • Leaves used for pain, inflammation, and respiratory disorders

  • Root bark used for digestive disorders, fever, and asthma
    ⚠️ Internal use requires caution due to toxicity.

RESEARCH

Scientific studies have identified:

  • Phytochemicals: Cardiac glycosides (calotropin, uscharin), flavonoids, alkaloids, triterpenoids

  • Pharmacological activities:

    • Anti-inflammatory

    • Antimicrobial

    • Analgesic

    • Anticancer (in vitro and animal models)

    • Antioxidant

Most research is preclinical, with limited human clinical evidence.

BIOLOGY

  • Life form: Perennial shrub

  • Reproduction: Sexual (seeds) and vegetative

  • Latex production: Continuous, acts as chemical defense

  • Adaptations: Thick cuticle, reduced water loss, deep root system

TOXICITY

Calotropis gigantea is toxic if misused.

  • Latex can cause skin irritation and eye damage

  • Cardiac glycosides may affect heart rhythm

  • Ingestion of raw plant parts can be dangerous

  • Not recommended for children, pregnant women, or unsupervised medicinal use

CONCLUSION

Calotropis gigantea (Akanda) is a medicinally important yet potentially toxic plant with strong ecological adaptability. Traditional knowledge and modern research both highlight its pharmacological potential. However, due to its toxicity, scientific validation, dosage standardization, and clinical studies are essential before safe therapeutic use can be widely recommended.

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