What is Walidda antidysenterica used for in Ayurveda?

It is primarily used to treat dysentery, diarrhoea, and intestinal worm infestations. The bark and seeds are also used in formulations for fever, skin inflammation, and menstrual irregularities in Sri Lankan traditional medicine.

Is Walidda antidysenterica the same as Holarrhena antidysenterica?

Yes. The two names refer to the same plant species; Walidda antidysenterica is the designation used in Sri Lanka's Ayurvedic plant catalogues. The species is also known as Kurchi or Tellicherry bark in wider South Asian and trade contexts.

What is the Sinhala name for Walidda antidysenterica?

The most widely used Sinhala name is Wali Intika. It is also sometimes called Kurchi in Sri Lanka, following the broader South Asian common name.

What active compounds are found in Walidda antidysenterica bark?

The bark contains steroidal alkaloids including conessine and kurchicine, which have been studied for their effects against amoebic dysentery and intestinal parasites. Research broadly supports the antibacterial and anti-inflammatory properties attributed to it in traditional medicine.

Can Walidda antidysenterica preparations be self-administered?

Traditional Ayurvedic sources indicate specific dosages and combinations depending on the individual's constitution and condition. It is strongly advisable to consult a qualified Ayurvedic practitioner before using preparations from this plant, as improper use could cause adverse effects.

Is Walidda antidysenterica an endangered species in Sri Lanka?

It is not currently classified as endangered, but wild populations face pressure from over-harvesting for medicinal use. Conservation guidelines recommend cultivated sourcing and sustainable bark-harvesting techniques to ensure long-term availability.

Walidda antidysenterica – Ayurvedic Plant Guide

Q: Where does Walidda antidysenterica grow in Sri Lanka?

It is found mainly in the dry and intermediate zones, particularly in the North Central and North Western provinces. It grows naturally in scrub forests and dry deciduous woodland, and is sometimes cultivated in home gardens and Ayurvedic herb gardens.

Walidda antidysenterica (syn. Holarrhena antidysenterica) is a deciduous shrub or small tree native to the Indian subcontinent and Sri Lanka. Known in Sinhala as Wali Intika or Kurchi, it holds a well-established place in Sri Lanka's catalogue of Ayurvedic medicinal plants, valued for centuries by traditional physicians — veda mahathayas — for its potent bark and seeds.

What is Walidda antidysenterica?

Walidda antidysenterica belongs to the family Apocynaceae. It grows as a small to medium-sized tree, typically reaching four to eight metres in height, with pale, corky bark and elliptic leaves arranged in opposite pairs. The tree produces clusters of white, fragrant flowers and long, paired seed pods that split open when mature to release flat, wind-dispersed seeds.

The species epithet antidysenterica directly references its primary traditional application: the treatment of dysentery and related gastrointestinal complaints. This was formally recognised by early European botanists who documented its use across South Asia.

Where does Walidda antidysenterica grow in Sri Lanka?

The tree is found across the dry and intermediate zones of Sri Lanka, often growing in scrub forests, forest margins, and areas with seasonal drought. It is particularly common in the North Central and North Western provinces, thriving in well-drained, sandy or loamy soils. In some areas it is cultivated in home gardens and Ayurvedic herb gardens specifically for its medicinal bark.

Wild populations can be encountered in the buffer zones of protected areas such as Wilpattu National Park, where dry-zone scrub forest provides ideal habitat.

What are the traditional medicinal uses?

In Sri Lankan Ayurvedic medicine, every part of the tree — bark, seeds, leaves, flowers, and roots — carries therapeutic value, though the bark and seeds are most widely used. Traditional practitioners prescribe preparations made from this plant to address a range of conditions:

Dysentery and diarrhoea: Bark decoctions are the most classical application, used to reduce intestinal inflammation and control bacterial dysentery.
Intestinal parasites: Seed powders and bark extracts are traditionally used as anthelmintic agents to expel intestinal worms.
Fever: Bark preparations feature in formulations aimed at reducing fever, particularly associated with infections of the digestive tract.
Skin conditions: Leaf pastes and decoctions have topical applications for minor skin inflammation and infections.
Menstrual disorders: In classical Ayurvedic texts, seed preparations are referenced in formulations for regulating menstruation.

Several classical Ayurvedic compound formulations — including Yogaraja Guggulu and related preparations — draw on plants from similar dry-zone habitats and share overlapping therapeutic traditions with Walidda antidysenterica.

What does modern research say about its active compounds?

Scientific investigation has identified several significant phytochemicals in Holarrhena antidysenterica. The bark is rich in steroidal alkaloids, with conessine and kurchicine being the most studied. Conessine in particular has demonstrated activity against Entamoeba histolytica — the protozoan responsible for amoebic dysentery — in laboratory studies, lending biochemical credibility to the plant's traditional reputation.

Research has also indicated antifungal, antibacterial, and anti-inflammatory properties in various extracts. The seeds contain kurchiside and related alkaloids that show anthelmintic effects in experimental models. While clinical trials in humans remain limited, the phytochemical evidence broadly supports the traditional applications documented in Ayurvedic literature.

How is Walidda antidysenterica used in Ayurvedic formulations?

In Sri Lankan traditional medicine, the bark is typically dried and powdered or prepared as a water decoction (kashaya). It commonly appears in compound formulas alongside other dry-zone medicinal plants such as Acacia chundra and Pongamia pinnata, blended to address specific imbalances in the three Ayurvedic doshas.

Seeds may be ground into a powder (churna) and taken with honey or warm water. In some regional traditions, the fresh bark is boiled and the resulting liquid is used as a wash for skin complaints. As with all Ayurvedic preparations, dosage and formulation are determined by a qualified practitioner based on the individual's constitution and condition.

Is Walidda antidysenterica the same as the Kurchi tree?

Walidda antidysenterica and Holarrhena antidysenterica (Wall. ex A.DC.) refer to the same species under different taxonomic authorities — the name Walidda is used within certain regional classifications and Sri Lanka's Ayurvedic plant catalogues. Common names include Kurchi, Indrajav, and Tellicherry bark in English trade contexts. The Sinhala name Wali Intika is most widely used in Sri Lanka.

What conservation considerations apply?

Increasing demand for bark from wild trees — driven by both local Ayurvedic practice and export to larger South Asian herbal markets — has placed some pressure on natural populations. Sustainable harvesting guidelines encourage collection from cultivated sources and recommend taking bark in strips rather than girdling the trunk, which would kill the tree. Several Ayurvedic research institutions in Sri Lanka promote cultivation of this and related medicinal species as part of broader efforts to protect the country's traditional plant heritage.