Question 1

What is Tabernaemontana divaricata called in Sinhala?

Accepted Answer

The plant is commonly known as Watu Sudda in Sinhala. It is also referred to as pinwheel flower or crepe jasmine in English, reflecting its distinctive twisted white petals.

Question 2

Is Tabernaemontana divaricata used in Sri Lankan Ayurveda?

Accepted Answer

Yes, it is formally listed in Sri Lanka's Ayurvedic plant catalogue. Various parts of the plant — roots, bark, leaves, and latex — are used in traditional preparations for inflammation, skin conditions, and eye care, among other applications.

Question 3

Is the milky sap of Tabernaemontana divaricata toxic?

Accepted Answer

The white latex contains alkaloids and can be irritating to skin and mucous membranes on contact. While the plant has recognised medicinal uses under trained Ayurvedic guidance, self-administration of the sap or extracts without professional advice is not recommended.

Question 4

Where can I see Tabernaemontana divaricata growing in Sri Lanka?

Accepted Answer

The shrub grows across Sri Lanka's lowland and mid-elevation regions and is commonly found in home gardens, temple grounds, and at forest edges in the wet and intermediate zones. It is especially visible near Buddhist and Hindu places of worship, where its white flowers are used as offerings.

Question 5

What alkaloids are found in Tabernaemontana divaricata?

Accepted Answer

Research has identified iboga-type alkaloids, including coronaridine and voacangine, in the plant's tissues. These compounds are of active scientific interest for potential neurological and antimicrobial effects, though they are not yet in mainstream clinical use.

Question 6

How do you grow Tabernaemontana divaricata?

Accepted Answer

The plant is easily propagated from semi-hardened stem cuttings, which root well in a free-draining medium under warm conditions. Once established, it requires minimal care, tolerates short dry spells, and benefits from light pruning after flowering to keep a compact shape.

Question 7

Why are the flowers of Tabernaemontana divaricata significant in Sri Lankan culture?

Accepted Answer

The pure white flowers are considered auspicious in both Buddhist and Hindu traditions and are commonly offered at shrines and temples. This cultural role has led to the plant being deliberately cultivated near religious sites and household prayer spaces across the island.