Borassus, commonly known as palmyra palms, is a genus of five species of fan palms in the family Arecaceae (order Principes), native to tropical regions of Africa, Asia, and Papua New Guinea. These are massive, long-lived palms reaching up to 30 metres in height, with robust trunks bearing distinct leaf scars; in some species the trunk develops a characteristic swelling just below the crown. The large, fan-shaped leaves measure 2–3 metres long and carry spines along the petiole margins. All species are dioecious, bearing male and female flowers on separate trees; male flowers are small and clustered in pendulous catkins, while female flowers are globe-shaped and solitary.
The fruits are large — 150–250 mm wide — and roughly spherical, containing one to three seeds enclosed in woody endocarps that resist digestion, allowing elephants, monkeys, and other frugivores to disperse them intact. The fibrous pulp is aromatic and sweet. Seedlings have an extended establishment phase during which growth is directed underground, an adaptation that provides protection against frequent fires in the savanna habitats where several species occur.
The most widespread and economically significant member is Borassus flabellifer, the Asian palmyra palm, which has been cultivated across South Asia and Southeast Asia for millennia and is credited with over 800 documented uses in India and Cambodia alone. Other notable species include B. aethiopum (African palmyra palm) and B. madagascariensis from Madagascar. The palmyra palm is the national floral emblem of Cambodia and can live for more than a century.
Etymology
The name "palmyra palm" is the widely used common name for the genus, particularly Borassus flabellifer. The origin of the genus name Borassus is not explained in available sources.
Distribution
Borassus palms are native to tropical Africa, Asia, and Papua New Guinea. They are particularly widespread across South Asia and Southeast Asia, and several species occur in sub-Saharan Africa and Madagascar. Borassus flabellifer is most prominent in India, Sri Lanka, Cambodia, and Indonesia.
Ecology
Borassus palms grow in tropical savanna and seasonally dry habitats. Their seedlings undergo an extended underground establishment phase that protects them from frequent grass fires; once the stem grows above savanna vegetation height the plant becomes less fire-vulnerable. Large frugivores, including elephants and monkeys, consume the fruits and disperse the seeds, whose woody endocarps withstand digestion.
Cultivation
Palmyra palms are among the most economically useful trees in tropical Asia, with over 800 recorded uses in India and Cambodia. Leaves are woven into thatching, mats, baskets, fans, hats, and umbrellas, and were historically used as writing material in ancient India. The hard, heavy black timber is prized for construction in water-exposed structures such as wharves and boats. The inflorescence sap is tapped to produce toddy, which is fermented into arrack or evaporated into jaggery (palm sugar). Young plants, fruits, and seeds are eaten raw or cooked, and the roots can be dried into a hard snack called odiyal.
Cultural Uses
The palmyra palm (Borassus flabellifer) is the national floral emblem of Cambodia and is visible around the temple complex of Angkor Wat. In ancient India, prepared palmyra leaves served as writing paper, with leaves preserved in salted, turmeric-infused water, polished with pumice, and inscribed with a stylus in a cursive connected style. In Sri Lanka the tree is particularly important in the north, where it supports jaggery production. Across its range the sap and various plant parts have documented medicinal applications.
