The Coco de Mer (Lodoicea maldivica) is a legendary palm species in the family Arecaceae, renowned for producing the largest seed in the entire plant kingdom. Endemic to just two islands in the Seychelles archipelago, this extraordinary palm has captivated explorers, botanists, and collectors for centuries.
• Produces the heaviest known seed of any plant, weighing up to 25 kg (55 lbs)
• The seed's distinctive bilobed shape — resembling a human pelvis or paired buttocks — has fueled myths and superstitions for millennia
• Known locally in Seychelles Creole as "Koko-d-Mer"
• The genus Lodoicea is monotypic, meaning L. maldivica is its only species
• National tree of the Seychelles and a symbol of the nation's unique biodiversity
Taxonomie
• First scientifically described in 1800, though known to Arab and European traders for centuries prior
• Before the Seychelles were discovered, washed-up seeds were occasionally found floating on Indian Ocean shores and in the Maldives — hence the species epithet "maldivica"
• These mysterious seeds, which do not float when fresh (only dead, hollowed-out nuts wash ashore), were believed to grow on a mythical underwater tree
• In the Maldives, found seeds were considered so valuable that they could only be collected by the Sultan; possession by commoners was punishably by death
• The Seychelles' Vallée de Mai on Praslin, a UNESCO World Heritage Site since 1983, harbors the largest remaining natural population
Trunk & Crown:
• Trunk is erect, reaching heights of 25–34 m (82–112 ft) with a diameter of up to 50 cm
• Crown bears a fan of enormous, pleated, fan-shaped (palmate) leaves
• Individual leaves can span up to 6 m (20 ft) long and 3.6 m (12 ft) wide, among the largest of any palm
• Petioles (leaf stalks) are robust, up to 4 m long, with a deeply channeled upper surface
Flowers:
• Dioecious — male and female flowers occur on separate trees
• Male inflorescences are catkin-like, up to 2 m (6.5 ft) long, producing copious pollen
• Female inflorescences are much shorter, bearing fewer but much larger flowers
• Pollination is believed to involve both wind and insects, though the exact mechanisms remain incompletely understood
Fruit & Seed:
• The fruit is a large, fibrous drupe containing one (rarely two or three) seeds
• The seed is bilobed, resembling a human pelvis — the largest and heaviest seed of any known plant
• Fresh seeds weigh 15–25 kg (33–55 lbs); the largest recorded specimen weighed approximately 25 kg
• Fruit development is extraordinarily slow, taking 6–7 years from pollination to full maturity
• The endosperm (the edible portion inside the seed) is firm, white, and jelly-like when immature, hardening with age
Habitat:
• Found in mature, undisturbed palm forests on granitic hillsides and valleys
• Prefers deep, well-drained soils derived from weathered granite
• Grows in mixed palm forest communities alongside other endemic species such as Deckenia nobilis and Nephrosperma vanhoutteanum
• The Vallée de Mai and Fond Ferdinand on Praslin, and parts of Curieuse Island, represent the core remaining habitat
Reproduction & Growth:
• Extremely slow-growing — a seedling may take 25–50 years to reach reproductive maturity
• Trees are estimated to live 200–300+ years
• Seed dispersal is limited; heavy seeds fall near the parent tree, resulting in dense, clumped populations
• Germination is slow and can take 1–2 years
• The species' restricted range and slow reproduction make population recovery from disturbance extremely difficult
Ecological Role:
• Provides habitat and food for endemic fauna, including the Seychelles Black Parrot (Coracopsis barklyi), which feeds on the fruit
• Fallen leaves and decaying fruit contribute to nutrient cycling in the forest floor ecosystem
• Total wild population estimated at approximately 8,000 mature individuals
• Distribution is restricted to just two islands (Praslin and Curieuse) with an area of occupancy of less than 20 km²
• Major threats include:
• Habitat loss and degradation from fires (both natural and anthropogenic)
• Illegal harvesting and poaching of seeds for the souvenir and collector trade
• Invasive species, particularly introduced plants that compete for resources
• Climate change impacts on the small island ecosystem
• Strict legal protections are in place:
• All Coco de Mer palms and their seeds are protected under Seychelles law
• The Vallée de Mai is a UNESCO World Heritage Site and a strictly managed nature reserve
• Export of seeds requires a government-issued permit
• Poaching carries severe penalties including fines and imprisonment
• Conservation programs include habitat restoration, fire management, seedling cultivation, and community education
Climate:
• Requires a humid tropical climate with no frost
• Optimal temperature range: 24–30°C year-round
• High annual rainfall (2,000–3,000 mm) with no prolonged dry season
Soil:
• Deep, well-drained, humus-rich soils derived from weathered granite
• Slightly acidic to neutral pH
Light:
• Young plants benefit from partial shade; mature trees tolerate full sun
Propagation:
• By seed only — vegetative propagation is not feasible
• Seeds must be fresh; viability declines rapidly once removed from the fruit
• Germination is extremely slow, typically 1–2 years
• Seedlings grow very slowly, requiring decades to reach maturity
Legal Note:
• International trade in Coco de Mer seeds is regulated under CITES Appendix II
• Collection from the wild without authorization is illegal in the Seychelles
• Prospective growers must obtain proper permits and source seeds from authorized nurseries
Anecdote
The Coco de Mer has inspired some of the most extraordinary myths and legends in botanical history: • For centuries, before the Seychelles were known to Europeans, the massive bilobed seeds washed up on distant Indian Ocean shores. Because no one had ever seen the tree they came from, it was widely believed that the seeds grew on a colossal underwater tree at the bottom of the ocean — a "sea coconut tree" rooted in the abyss. • In the Maldives, where washed-up seeds occasionally appeared, the Sultan claimed exclusive rights to all found specimens. Anyone caught hiding a seed faced the death penalty. The seeds were so prized that they were sometimes traded for their weight in gold. • When the Seychelles were finally explored and the true source discovered, European royalty clamored for the nuts. The Holy Roman Emperor Rudolf II reportedly offered 4,000 gold florins for a single specimen. • The seed's suggestive shape led to numerous aphrodisiac legends. It was believed that the male and female trees engaged in passionate mating rituals on stormy nights, with the male trees uprooting themselves to approach the females — a myth that supposedly explained why no one had ever witnessed the act. • A Coco de Mer seed was given as a gift to Prince William and Catherine Middleton by the people of the Seychelles for their 2011 royal wedding. • The seed's development is one of the slowest of any plant: from pollination to a fully mature fruit takes approximately 6–7 years, and the entire reproductive cycle from flower to a seed capable of germination can span over a decade.
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