When exploring the remarkable diversity of plant seeds, two absolute extremes quickly emerge—both capable of inspiring a smile as well as genuine scientific admiration. On one end are microscopic orchid seeds, so small they are nearly invisible to the naked eye. On the other stands Lodoicea maldivica—the palm that produces the largest and heaviest seeds in the world.
Orchid seeds are extraordinarily small—often around 50–100 µm. Under laboratory conditions, seeds of some species approach sizes of 80–250 µm, which still places them firmly within the microscopic realm compared to most other plants. Seeds of Arabidopsis thaliana, widely used in research, fall within a similar range of roughly 80 µm to 250 µm. Although not the smallest in the world, their size clearly illustrates how small seeds handled in laboratory research can be.
What orchid seeds lack in size and nutrient reserves, they compensate for through a highly specialized symbiosis with mycorrhizal fungi. Without these fungi—capable of supplying the embryo with carbon, nitrogen, and energy—the seed will not germinate in nature. In effect, the plant relies on an initial “partner network” to establish itself. This strategy enables orchids to produce millions of seeds that are dispersed over long distances by wind, each one searching for a compatible fungal partner.
At the opposite end of the spectrum lies the seed of Lodoicea maldivica—so large and heavy that, with slight exaggeration, it could be described as a “natural sculpture.” These fruits can weigh up to around 30 kg and measure roughly 40–50 cm across—remarkable dimensions for what is, biologically speaking, a single seed.
Its distinctive shape is frequently compared to the form of human buttocks or a pelvis, a resemblance that has fueled centuries of legends and folklore.
Unlike the “dust-like” orchid seeds, coco de mer does not represent a strategy of quantity. Its enormous size and massive internal energy reserves equip it to survive in environments where a tiny seed would stand little chance. The palm grows naturally only on two islands of the Seychelles. Its seeds take 6–7 years to mature, and once they fall, they require approximately another two years before they begin to germinate.
Coco de mer is so rare and protected that its seeds cannot simply leave the Seychelles. Every legally exported specimen must be accompanied by an official certificate (a derivation decree) confirming its origin and lawful export status. This regulation serves both to protect this unique species and to prevent the spread of potential pathogens into other ecosystems. Unlike other coconuts, coco de mer did not spread across the oceans to other parts of the world because its massive seed is unable to float.
Between orchids and this palm “camel” of the seed world lies a striking contrast: tiny seeds rely on symbiosis and wide dispersal, while the gigantic coco de mer concentrates its resources into a single investment—an immense store of energy that allows the seedling to overcome the initial challenges of life.
Both strategies demonstrate how diverse and elegant evolutionary solutions can be, shaped over millions of years to address the same fundamental problem: how to survive, grow, and reproduce in a competitive world.
Working with small seeds such as those of Arabidopsis is undoubtedly more practical at Labdeers than handling a coco de mer seed weighing several kilograms—though who knows, maybe one day we’ll take on that challenge too. And if that day comes… it will be some serious HEAVY Science!
