Note: This is an AI-generated translation from my original Italian article: Trentaquattro miliardi di istruzioni per un fiore

What happens when you discover a flower has more to teach you than you thought?

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Tulipandia

The sun was the kind you miss after days of rain. That April sun that when it finally arrives feels like a gift, and for the first hour you're there thinking "finally," and after three hours you're there thinking "enough, please, some shade." There was no shade. We were at Tulipandia with the family and some friends, on a sloping plot of land where they had arranged tulip compositions that took your breath away.

I thought I knew what a tulip was. What you know too: a stem, six petals, cup-shaped, red or yellow. The tulip from children's drawings, the one on postcards from the Netherlands. Well, no.

There were marbled tulips, with colors shifting from white to violet in gradations that didn't look natural. There were fringed ones, with petal edges cut up as if someone had gone at them with tiny scissors. And then there were those that had both characteristics: fringed and marbled, with shapes so improbable that they looked more like sculptures than flowers. I didn't even know they existed. I had stayed with "normal" tulips, the ones with the clean shape and uniform color, and in front of me were dozens of varieties I had never seen.

You could pick them with their bulbs and take them home. You had to pay, mind you. But I couldn't resist: I chose the strangest, most absurd shapes, the ones that didn't even look like tulips. My daughter was in love. She would have wanted to take home dozens. Every time she saw a new one with a different shape, she'd stop and ask us to help her pull up that tulip with its bulb. My wife and I followed her between the rows, and she wanted another one, and then another, and then another. All different.

And there I was, under that sun that was starting to weigh, and I stopped for a second to look at that sloping field full of flowers and asked myself: why? Why all this diversity? Why isn't there just one tulip, perfect, replicated to infinity?

The wrong question

Because actually the right question isn't "why so many?" The right question is: how can a flower contain so many possibilities?

And the answer, when you go looking for it, is one of those things that makes you feel a little ignorant and a little amazed at the same time. So that evening, back home, I started searching. And here's what I found.

The genome you don't expect

The tulip genome is made up of approximately 34 billion base pairs. To put things in perspective: the human genome has about 3 billion. A tulip has roughly eleven times more genetic "instructions" than a human being. Zonneveld, from Leiden University, measured the genome size of different wild tulip species in 2009, and the numbers are impressive.

But size alone explains nothing. What matters is flexibility. Tulip colors arise from the interaction of two pigment families: anthocyanins, responsible for reds, violets, and dark tones, and carotenoids, which produce yellows and oranges. A study by Wang et al. published in Plant Science in 2022 identified 46 different carotenoids in tulips. Forty-six. In a flower.

These pigments are regulated by a genetic control system called the MYB-bHLH-WD40 complex. If the name means nothing to you, think of it as a mixer. Few ingredients, but the mixer decides how much of each to add, in which cells, at which moment of petal development. Change the mixer settings slightly, and the same flower produces a completely different color. And it's not all genetics: temperature, light, and soil pH also influence the final result. The exact same bulb can produce flowers with different hues depending on where you plant it.

From roughly 75-100 wild species, originating in Central Asia, humans have produced over the centuries more than 4,000 registered varieties, classified into 15 different groups. The potential was already written in the genome. Humans just found it and amplified it.

The beauty that was a disease

And here's the part that left me speechless.

Those marbled tulips I saw at Tulipandia, the ones with the streaks and flames that shift from one color to another? For centuries, in seventeenth-century Holland, they were the most precious tulips in the world. A single bulb of the Semper Augustus, the most famous, was offered for sums reaching up to 10,000 guilders: the price of a stately home in the center of Amsterdam.

Nobody knew why those tulips were the way they were. Growers thought it depended on the soil, the care, some technical secret. Some thought it was a gift of providence. What erupted was what historians consider the first speculative bubble in modern history: tulip mania. People bought and sold bulbs that hadn't even been planted yet, drawing up contracts on future harvests. An entire economy built on the beauty of a flower.

The truth? Those tulips were sick.

In 1928, nearly 350 years after the Flemish botanist Carolus Clusius had first described the variegations in 1576, scientists discovered the Tulip Breaking Virus, a potyvirus that infects petal cells and disrupts anthocyanin production irregularly. One cell gets infected, the one next to it doesn't. Pigment is produced here but not there. The result is those streaks, those flames, those mosaics that had driven half of Europe mad.

And there's a detail that makes it all even more bitter: the virus weakened the plants. The "broken" tulips (as they were called) were more fragile, less fertile, shorter-lived. Which made them rarer. Which made them more expensive. Fragility fed value. For centuries, people paid fortunes for sick flowers, mistaking a pathology for an aesthetic miracle.

Today many marbled varieties are obtained through genetic selection, without the virus. But the story remains: the first time humanity fell in love with that pattern, it was looking at a disease without knowing it. (A bit like french fries: delicious, but not exactly the pinnacle of health.)

Fringed, parrot, and other mutations

And those fringed tulips my daughter wanted to take home by the dozen? Mutations. Spontaneous changes in DNA that altered petal edge development, producing those serrated, almost lace-like margins. Someone noticed them, found them beautiful, and started selecting and reproducing them.

"Parrot" tulips, those with undulating, ruffled petals that seem to be moving even when they're still, have a similar story: they probably originated as spontaneous mutations, perhaps accelerated by the virus itself. Double tulips, those that look like peonies, derive from anomalies in the expression of genes that control flower structure. Instead of producing a single layer of petals, they produce many — like a printing error that turns out more beautiful than the original.

In the twentieth century, growers went even further: they used radiation to induce artificial mutations in bulbs, forcing the appearance of new colors and new shapes. Four hundred years of human selection compressed into a few generations what in nature would have required geological timescales. Humans took a genome already rich with possibilities and explored it with an obsession that, when you think about it, isn't so different from the tulip mania of the seventeenth century. Just more scientific. (Maybe.)

The plan written within

There's something about this whole story that strikes me, and it goes beyond biology.

The tulip genome already contained all those possibilities. The 46 carotenoids, the anthocyanins, the genes for fringed edges, for double petals, for the infinite gradations. Everything was already there, written in those 34 billion base pairs, long before a Dutch grower decided to select the first bulb. Humans didn't invent the tulip's diversity. They discovered it. They opened a book that had already been written and read the chapters one by one.

There it is: what stopped me at Tulipandia wasn't just the beauty. It was the generosity of that beauty. A generosity that goes beyond function. Tulip colors serve to attract pollinators, and insects see the light spectrum differently from us. Technically, these flowers aren't beautiful for us. And yet we find them beautiful. My daughter found them beautiful. A beauty in excess of what's strictly necessary, a variety that almost seems like an invitation: look how many possibilities exist.

If I think about it, it's the same principle everywhere. A wheat field all the same is fragile: one suitable parasite and everything dies. A wild meadow with a hundred different species survives almost anything. Diversity is not a luxury. It's the plan. Monoculture is the exception, the human invention. Nature, left to itself, diversifies. Always. As if someone had written into the rules of the game that variety is not optional.

The tulips that come home

We went home with the bulbs in a bag. The fringed ones, the ones with the most absurd shapes. My daughter carried them like a treasure. She had chosen all different ones, of course. Nobody would choose ten identical tulips.

Maybe diversity doesn't need to be explained. It just needs to be looked at. At twelve, you already know that, without anyone needing to prove it to you.

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Sources

• Wang, F. et al. (2022), "New insight into the pigment composition and molecular mechanism of flower coloration in tulip cultivars", Plant Science. Link
• Dekker, E.L. et al. (2025), "How the tulip breaking virus creates striped tulips", Communications Biology, Nature. Link
• Zonneveld, B.J.M. (2009), "The systematic value of nuclear genome size for all species of Tulipa L.", Plant Systematics and Evolution, Springer. Link
• Marasek-Ciolakowska, A. et al. (2018), "Breeding of lilies and tulips: interspecific hybridization and genetic background", Breeding Science. Link