Question 1

What is Rhinacanthus nasutus used for in Ayurveda?

Accepted Answer

In Sri Lanka's Ayurvedic tradition, Rhinacanthus nasutus is primarily used to treat skin conditions such as ringworm, eczema, and scabies. Preparations from its roots and leaves are typically applied topically as a paste or wash. Its use in compound formulations for rheumatic conditions has also been recorded by traditional practitioners.

Question 2

What is the Sinhala name for Rhinacanthus nasutus?

Accepted Answer

The plant is commonly known in Sinhala as Wanathapalaa (වනතාපලා). It is also referred to by its English common names snake jasmine and white crane flower, the latter a reference to the distinctive shape of its small white blooms.

Question 3

Is Rhinacanthus nasutus safe to use at home?

Accepted Answer

The plant contains active naphthoquinone compounds, which means self-administered internal use carries some risk without professional guidance. Topical application of root paste for minor skin conditions is historically common, but any medicinal use is best carried out under the supervision of a qualified Ayurvedic practitioner, particularly for internal preparations.

Question 4

Where can I find Rhinacanthus nasutus growing naturally in Sri Lanka?

Accepted Answer

The shrub grows widely across the lowland dry and intermediate zones of Sri Lanka, often found along roadsides, scrubland margins, and field edges. It is also cultivated in home gardens and Ayurvedic hospital compounds. It is not restricted to any particular region or protected area.

Question 5

What active compounds have scientists found in Rhinacanthus nasutus?

Accepted Answer

Researchers have identified rhinacanthin naphthoquinone derivatives as the most pharmacologically significant compounds in the plant, particularly in the roots. Lupeol, β-sitosterol, and flavonoids have also been isolated. Laboratory studies suggest antifungal, anti-inflammatory, and anticancer properties, though clinical human trials remain limited.

Question 6

What family does Rhinacanthus nasutus belong to?

Accepted Answer

Rhinacanthus nasutus belongs to the family Acanthaceae, a large family of flowering plants found across tropical and subtropical regions. Within that family, it is a compact, multi-branched shrub distinguished by its tubular white flowers and opposite oval leaves.

Question 7

Is Rhinacanthus nasutus the same as snake jasmine?

Accepted Answer

Yes, snake jasmine is one of the most widely used English common names for Rhinacanthus nasutus. White crane flower is another common name, derived from the two-lipped shape of its white flowers. The plant is a single species, though regional common names vary considerably across South and Southeast Asia.