Cynodon dactylon, commonly known as Bermuda grass or doob grass, is one of the most widely recognised plants in Sri Lanka's canon of ayurvedic medicine. Though modest in appearance — a low-growing, creeping grass found across roadsides, fields, and temple grounds — it carries a long history of therapeutic use across South Asian healing traditions, including the classical Sinhala ayurvedic system practised in Sri Lanka for over two millennia.
What is Cynodon dactylon and where does it grow in Sri Lanka?
Cynodon dactylon belongs to the family Poaceae and is a perennial grass that spreads aggressively via stolons and rhizomes, allowing it to colonise a wide range of habitats. In Sri Lanka it appears at virtually every elevation, from coastal lowlands to the mid-country hills, thriving in open, sun-exposed areas with well-drained soil. It is particularly common around paddy field margins, forest clearings, and the edges of ancient tank systems in the dry zone.
The plant is known locally in Sinhala as Durva (දුර්වා) and has sacred as well as medicinal connotations. Its slender blue-green blades and fine, branched flower spikes make it easy to identify once encountered. Although often treated as a common lawn weed in a modern context, traditional healers have long regarded it as among the most useful plants available at no cost from the surrounding environment.
How is Cynodon dactylon used in ayurvedic medicine?
In the Sri Lankan ayurvedic tradition, virtually every part of the Cynodon dactylon plant — the whole herb, root, and freshly expressed juice — is considered medicinally active. Classical texts and contemporary practitioners cite a broad range of applications:
- Haemostatic properties: Fresh juice or paste of the grass is traditionally applied topically to minor cuts and wounds to help slow bleeding.
- Diuretic action: Preparations made from the herb have long been used to support urinary tract health and encourage healthy urine flow.
- Anti-inflammatory use: Poultices prepared from the plant are applied externally to relieve swelling and skin irritations.
- Digestive support: Decoctions are sometimes recommended in traditional practice for managing conditions related to the digestive system, including dysentery.
- Nervous system: In some classical formulations, the plant is included as a supporting ingredient for preparations aimed at calming the mind and managing stress-related conditions.
Cynodon dactylon is classified in ayurvedic literature according to its rasa (taste), guna (qualities), virya (potency), and vipaka (post-digestive effect). It is generally described as sweet and astringent in taste, cool in potency, and balancing to pitta and kapha doshas. These classifications guide the contexts in which practitioners incorporate it into compound formulations.
What is the role of Cynodon dactylon in Sri Lanka's ayurvedic plant catalogue?
Sri Lanka maintains a formal catalogue of ayurvedic medicinal plants, underpinned by the Ministry of Health's Department of Ayurveda. Cynodon dactylon holds a catalogued position within this system — referenced under the identifier LK94005998 — which reflects its recognised status as a plant with documented traditional use rather than simply folkloric mention.
The island's biodiversity provides a remarkable pharmacopoeia of such plants. Alongside grasses like Cynodon dactylon, Sri Lanka's ayurvedic tradition draws on trees, shrubs, roots, and resins from diverse ecosystems. Acacia chundra, for instance, is another catalogued medicinal species whose bark and heartwood are used in classical formulations. Similarly, Pongamia pinnata contributes oil and leaf preparations to the traditional pharmacopoeia. Together, these plants form a living heritage of botanical knowledge.
Does Cynodon dactylon appear in compound ayurvedic formulas?
Yes. While the plant is used in simple single-herb preparations — particularly fresh juice applications — it also appears as a supporting ingredient in compound formulas. Traditional texts describe its inclusion alongside other cooling, anti-inflammatory, and haemostatic herbs. Compound preparations in Sri Lankan ayurveda frequently combine plants with complementary profiles, and Cynodon dactylon's mild, broad-spectrum qualities make it a useful adjunct rather than a dominant active ingredient.
Practitioners working within the Sri Lankan tradition may also recommend it alongside dietary changes and lifestyle practices, in keeping with the holistic framework that defines ayurvedic care. Anyone interested in using this or any other plant medicinally should consult a registered ayurvedic physician, as dosage, preparation method, and contraindications vary according to individual constitution and condition.
What is the cultural significance of this plant in Sri Lanka?
Beyond its medicinal role, Cynodon dactylon carries genuine cultural weight in Sri Lanka. The Sinhala name Durva connects the plant to Hindu and Buddhist ritual contexts across the subcontinent, where offerings of fresh green grass — often Cynodon dactylon — are presented to deities and used in ceremonial contexts. In Sri Lanka, the plant is associated with prosperity and fertility in certain temple rituals, reinforcing the idea that ayurvedic and religious traditions are historically intertwined rather than separate domains.
The grass also plays a practical agricultural role: its dense, spreading habit makes it effective for soil stabilisation on bunds and embankments, including the ancient irrigation structures that still define the landscape of the dry zone. Farmers in regions such as the North Central Province have long valued it in this dual capacity — as both a useful ground cover and a readily available medicinal resource.
How does Sri Lanka preserve its ayurvedic plant heritage?
Sri Lanka's commitment to documenting and preserving its ayurvedic plant tradition is reflected in formal cataloguing efforts, the operation of government ayurvedic hospitals, and the integration of ayurvedic education into the national university system. The Sinharaja Forest Reserve, a UNESCO World Heritage Site, is among the ecosystems that shelter many endemic and near-endemic plant species, including those used in traditional medicine, and its conservation is closely linked to the future of this botanical knowledge.
Private initiatives, academic research, and community-level practice also play a role. Village healers and home practitioners continue to grow, harvest, and apply plants like Cynodon dactylon in ways that have changed little over centuries, ensuring that practical knowledge is transmitted alongside the formal written record.
Can visitors learn about ayurvedic plants during a trip to Sri Lanka?
Several experiences across Sri Lanka give visitors direct contact with the country's medicinal plant tradition. Ayurvedic wellness centres — found across the hill country and along the southern coast — often incorporate explanations of the plant ingredients used in treatments. Herb gardens at some boutique properties allow guests to see, touch, and smell plants including Cynodon dactylon in a curated setting.
For those interested in the intersection of traditional medicine and landscape, a visit to agricultural communities in the dry zone or the wet zone's rainforest margins can be particularly illuminating. Guided nature walks in areas like the Makandawa Rainforest sometimes include plant identification components led by local naturalists who can point out medicinal species in their native habitat.
