Drymoglossum piloselloides

Drymoglossum piloselloides is a small epiphytic fern found across tropical and subtropical Asia, including Sri Lanka, where it holds a recognised place in the island's Ayurvedic pharmacopoeia. Though modest in size and easily overlooked on the bark of trees or rock faces, this plant has been valued by traditional healers for centuries as a source of therapeutic compounds.

What is Drymoglossum piloselloides?

Drymoglossum piloselloides belongs to the family Polypodiaceae. It is a creeping fern with two distinct types of fronds: sterile fronds that are round to oval and pressed close to the surface it colonises, and fertile fronds that are longer and narrower, bearing spores along much of their underside. The plant typically grows on the trunks and branches of trees, and occasionally on moist rocks, in humid lowland and mid-elevation forests.

In botanical literature it is sometimes catalogued under the synonym Pyrrosia piloselloides, reflecting periodic revisions in fern taxonomy. Across its range it goes by various local names, though in Sri Lanka it is most often referenced within Ayurvedic texts by its therapeutic properties rather than a widely used Sinhala common name.

Where does Drymoglossum piloselloides grow in Sri Lanka?

The species favours warm, humid environments and is distributed through Sri Lanka's wet and intermediate zones. It is commonly found colonising the bark of large trees in lowland rainforests, home gardens, and the edges of cultivated areas. Forest reserves such as the Sinharaja Forest Reserve provide ideal habitat conditions — dense canopy cover, high humidity, and a rich substrate of mature tree trunks.

Unlike some medicinal plants that require specific altitude or soil type, Drymoglossum piloselloides is relatively adaptable. It attaches to its host surface through a mat of rhizomes, drawing moisture from the air and from the bark rather than competing for soil nutrients.

What are the traditional Ayurvedic uses of this fern?

Within Sri Lanka's Ayurvedic tradition, the whole plant — fronds, rhizomes, and all — is the primary part used medicinally. Traditional practitioners have employed preparations made from this fern for a range of purposes, including addressing skin conditions, wounds, and inflammatory complaints. It has also been noted in texts relating to fever management and as a component in compound formulations.

Sri Lanka's Department of Ayurveda maintains a catalogue of indigenous medicinal plants, and Drymoglossum piloselloides appears within that register, affirming its continued recognition in formal traditional medicine practice on the island. This cataloguing is part of a broader national effort to document and preserve knowledge of medicinal flora, much of which is passed down through generations of traditional physicians known as veda mahattayas.

Related Ayurvedic compound preparations that draw on indigenous Sri Lankan plants include formulations such as Yogaraja Guggulu and Kaishore Guggulu, which illustrate how individual plant ingredients combine within classical Ayurvedic frameworks.

How is the plant prepared for medicinal use?

In traditional practice, fresh fronds are typically crushed or ground into a paste for external application. For internal use, the plant material may be dried and powdered or decocted in water. As with all Ayurvedic preparations, appropriate dosage and method of use are determined by a qualified practitioner taking into account the individual's constitution and condition — self-treatment without guidance is not recommended.

Modern phytochemical investigations have begun to identify the compounds present in the plant, including flavonoids and other secondary metabolites, though large-scale clinical trials remain limited. The existing ethnobotanical record provides the primary basis for its continued use.

Why does Sri Lanka have such a rich tradition of medicinal plant knowledge?

Sri Lanka's biodiversity is remarkable relative to the island's size. The country hosts a high proportion of endemic plant species, and its unbroken tradition of Ayurvedic medicine — supported by ancient texts such as the Sarartha Sangrahaya and royal patronage over many centuries — has created a detailed and sustained body of herbal knowledge. Many plants recorded in these classical texts continue to be cultivated or wildcrafted today.

The island's varied ecosystems, from coastal lowlands to montane cloud forests like those found around Horton Plains National Park, support an extraordinary range of medicinal flora. This ecological diversity underpins a pharmacopoeia that includes hundreds of plant species, each documented according to its properties, actions, and preparations within the Ayurvedic system.

Is Drymoglossum piloselloides related to other important plants in Sri Lanka's pharmacopoeia?

The Sri Lankan Ayurvedic catalogue encompasses a wide range of plant families, from towering timber trees to small epiphytic ferns like Drymoglossum piloselloides. Other species listed alongside it include Acacia chundra, whose heartwood is used in traditional preparations, and Pongamia pinnata, valued for its oil and bark in classical formulations. Together these plants represent the breadth of Sri Lanka's living herbal heritage.

Preserving this knowledge requires both the conservation of forest habitats and the documentation of traditional practice — twin priorities that Sri Lanka's health and environmental authorities are increasingly working to address in parallel.

Can visitors learn about Ayurvedic plants during a trip to Sri Lanka?

Sri Lanka offers several opportunities for travellers with an interest in traditional medicine and botanical heritage. Ayurvedic wellness centres, herb gardens attached to rural lodges, and guided nature walks in forested areas can all provide firsthand encounters with medicinal plants. Some estates and eco-lodges in the hill country and wet zone actively cultivate and demonstrate the use of plants from the Ayurvedic catalogue.

For those exploring the island's natural landscapes more broadly, forested areas across the wet zone — including the surroundings of the Makandawa Rainforest — provide the kind of humid, shaded environments where epiphytic ferns such as Drymoglossum piloselloides are most likely to be encountered on guided botanical walks.