Broussonetia zeylanica is a lesser-known but botanically significant plant native to Sri Lanka, catalogued among the island's Ayurvedic medicinal flora. It belongs to the family Moraceae — the same broad family as mulberry and breadfruit — and is endemic or near-endemic to the island, making it of particular interest to botanists, ethnobotanists, and practitioners of traditional medicine.
What is Broussonetia zeylanica?
Broussonetia zeylanica is a small to medium-sized tree or shrub found across the wetter lowland and mid-elevation zones of Sri Lanka. The genus Broussonetia is best known globally for the Paper Mulberry (Broussonetia papyrifera), used historically in East Asia for bark-cloth and paper production. The Sri Lankan species shares certain morphological characteristics with its relatives — including rough-textured leaves and fibrous bark — but occupies its own ecological and ethnobotanical niche on the island.
The species epithet zeylanica derives from "Zeylon," the historical Portuguese and Dutch rendering of Ceylon, signalling that this plant was recognised as distinctively Sri Lankan by early European botanists who documented the island's flora during the colonial era.
Where does Broussonetia zeylanica grow in Sri Lanka?
The plant is typically associated with humid forest margins, secondary growth woodland, and disturbed lowland forests in the wet and intermediate zones of the island. It is not commonly encountered at high elevations but may appear at mid-range altitudes in the transitional zones between dry and wet forest types.
Sri Lanka's extraordinary plant biodiversity — the island hosts several thousand flowering plant species, with a notable proportion being endemic — means that native trees like Broussonetia zeylanica often exist in habitats that overlap with better-known biodiversity hotspots. Protected areas such as the Sinharaja Forest Reserve, a UNESCO World Heritage Site, preserve the kind of wet lowland forest habitat where related species of the Moraceae family are well represented.
What are the traditional Ayurvedic uses of Broussonetia zeylanica?
In Sri Lankan Ayurvedic practice, plants are classified and applied according to their therapeutic properties, and Broussonetia zeylanica is included in the national catalogue of Ayurvedic medicinal plants maintained by the Department of Ayurveda. Traditional practitioners have historically drawn on the plant's bark and other plant parts, though documented clinical applications specific to this species are limited in published English-language literature.
Ayurveda as practised in Sri Lanka — sometimes distinguished as "Hela Wedakama" or Sinhala traditional medicine — integrates plant knowledge accumulated over centuries, with roots in classical texts as well as orally transmitted local expertise. Many plants in this pharmacopoeia, including Broussonetia zeylanica, remain understudied in modern phytochemical terms relative to their cultural significance.
For context on how plant-based Ayurvedic formulations are prepared and used, the compound preparation Yogaraja Guggulu offers an example of how multiple botanicals — including lesser-known species — are combined in classical Ayurvedic formulas.
How is Broussonetia zeylanica classified botanically?
- Kingdom: Plantae
- Order: Rosales
- Family: Moraceae
- Genus: Broussonetia
- Species: B. zeylanica
The genus Broussonetia was named after the French physician and naturalist Pierre Marie Auguste Broussonet. Within the genus, most species are native to Asia and the Pacific, and several have long histories of human use for fibre, medicine, and food.
Why does Sri Lanka have so many endemic medicinal plants?
Sri Lanka's position as a tropical island with a complex topography — ranging from coastal wetlands to montane cloud forests — has driven high speciation over millions of years. The island is recognised as one of 36 global biodiversity hotspots, with endemism rates among flowering plants estimated at around 26 percent. This means that more than one in four plant species found on the island occurs nowhere else on Earth.
The long tradition of Ayurvedic and folk medicine in Sri Lanka has meant that local healers developed knowledge of hundreds of these endemic and native species, including Broussonetia zeylanica, over many generations. That indigenous knowledge base is now increasingly cross-referenced with modern phytochemical research to identify bioactive compounds with therapeutic potential.
Other native trees catalogued within the Sri Lankan Ayurvedic pharmacopoeia include Acacia chundra, known locally as "Rathandara," which has a comparably long history of documented medicinal application in the region.
Is Broussonetia zeylanica under any conservation pressure?
As with many endemic or near-endemic plants in Sri Lanka, habitat loss through deforestation and land conversion in the wet zone poses an ongoing concern. While Broussonetia zeylanica is not among the most prominently discussed threatened plants of Sri Lanka, the broader decline of wet lowland forest — the habitat type most relevant to species like this — is well documented by conservation organisations and the Sri Lanka government's own biodiversity assessments.
Efforts by the Department of Ayurveda and botanical gardens to document, propagate, and conserve medicinal plant species contribute to the long-term availability of plants like Broussonetia zeylanica for both traditional healthcare and future research.
How does this plant relate to Sri Lanka's broader botanical heritage?
Sri Lanka has maintained formal botanical documentation of its flora since the colonial period, with institutions such as the Royal Botanic Gardens at Peradeniya — established in 1821 — serving as a living repository of the island's plant diversity. The Ayurvedic catalogue in which Broussonetia zeylanica is registered represents a parallel tradition of documentation rooted in medical rather than purely scientific classification.
Together, these systems reflect the island's dual botanical legacy: a scientific tradition developed largely under colonial patronage and a living Ayurvedic tradition maintained by practitioners trained in classical texts and field knowledge. Plants like Broussonetia zeylanica sit at the intersection of both.
