Random Terrestrial Plant Generator

What the random terrestrial plant generator does

Press the button and it hands you a land plant: an oak, a fern, a patch of moss, a horsetail, a rose, a stand of bamboo.

They look like a simple grab-bag of greenery. They are actually something stranger: a set of snapshots from wildly different chapters of a story hundreds of millions of years long. Some of the plants in this list are ancient survivors, almost unchanged since before there were flowers or forests. Others belong to a chapter so sudden and so recent that it genuinely alarmed Charles Darwin, who called it an "abominable mystery" and could not explain it.

How to use it

1. Choose how many you want. One if you are deciding, more if you are browsing.
2. Press Generate. A fresh draw every time.
3. Press Copy to take the set with you.

This list is a walk through deep time

Line up the plants in this list by age and they turn into a timeline of how green things conquered the land, because they did not all arrive together. They arrived in distinct waves, separated by enormous stretches of time, and representatives of each wave are still alive and sitting in this generator.

The mosses are the old guard. Plants like them were among the first to haul themselves out of the water and onto bare land, something like four hundred and seventy million years ago, when the continents were otherwise stone and mud. They are small and low and cling to damp places for a reason: they never fully solved the problem of living away from water, so they still need it close by.

The ferns, horsetails and clubmosses are the next great chapter, and they are living antiques. Their ancestors formed the first true forests, towering growths that covered the young continents in green long before any flower existed, long before any dinosaur. The unassuming horsetail in this list is a survivor of that lost world, a plant whose relatives were giants when the coal seams we now burn were being laid down.

Then come the conifers, the pines and firs and their kin, the great seed-bearing plants that clothed the world through the age of the dinosaurs. For vast stretches of time, this was the peak of plant life: cone-bearing trees, ferns, and not a single bloom anywhere on Earth.

And then, late, startlingly late, come the flowers. The rose, the tulip, the orchid, the sunflower. On the scale of plant history they are near-newcomers, and their arrival is the strangest event in the whole story.

The mystery that troubled Darwin

For most of the history of land plants, there were no flowers. The world was green, forested, ancient, and entirely without a single blossom, for hundreds of millions of years.

Then, in a geological blink, flowering plants appeared and took over almost the entire planet. In the fossil record they show up suddenly and already wildly diverse, and within what is, in deep-time terms, a short span, they had spread and multiplied and pushed the older plants aside across most of the globe. One moment, in the rocks, a world of ferns and conifers. Very soon after, a world blanketed in flowering plants of every kind.

This abruptness deeply unsettled Charles Darwin, and for a pointed reason. His whole theory rested on evolution being gradual, a slow accumulation of tiny changes over immense time. But the flowering plants did not look gradual at all. They looked like an explosion, arriving fast and diversifying faster, exactly the kind of sudden leap his theory said should not happen. In an 1879 letter to his friend the botanist Joseph Hooker, Darwin called the rapid rise of the flowering plants "an abominable mystery", and the phrase stuck, because the puzzle was real and he knew it threatened his own ideas.

It is a wonderful thing to know about the ordinary flowers in this list: that their sudden appearance in the deep past was, to the man who gave us the theory of evolution, not a delight but a problem, a genuine threat he never fully resolved in his lifetime. The rose was, for Darwin, a little abominable.

So what was the answer? What let the flowers erupt across the world and leave the ancient ferns and conifers in the shade? A large part of it comes down to a deal the flowers struck with the animal kingdom.

The bargain that painted the world

The older plants, the conifers and ferns, mostly reproduce by throwing their genetic material to the wind and hoping. A pine releases vast clouds of pollen into the air on the chance that a tiny fraction lands where it needs to. It works, but it is enormously wasteful, and it is blind: the wind carries pollen nowhere in particular, so the plant must produce staggering amounts to beat the odds.

The flowering plants found a radically better way, and the flower is that way. A flower is not a decoration. It is an advertisement and a payment aimed at animals, and it changed everything.

The bargain works like this. The flower offers a reward, usually sweet nectar, and advertises it with bright colour and scent so that an animal, most often an insect, can find it. The insect comes for the meal, and in feeding it gets dusted with pollen, which it then carries directly to the next flower it visits. Suddenly pollen is not thrown blindly to the wind but hand-delivered, addressed, carried straight from one flower to another of the same kind by a courier that is paid in nectar for the trip. It is vastly more efficient than scattering pollen to the breeze, and it let flowering plants reproduce in ways the wind-blown conifers never could.

And here is the beautiful part: this created a partnership that reshaped both sides at once. Flowers evolved to attract particular animals, and those animals evolved to exploit particular flowers, each shaping the other over millions of years. The colours, the scents, the shapes of blossoms are all a language aimed at pollinators, and the bodies and behaviours of countless insects are tuned in turn to flowers. The bees, the butterflies, the endless variety of blooms, all of it is one enormous co-evolved bargain between plants and animals, and it is very likely a big part of why the flowering plants exploded the way they did, fast enough to trouble Darwin.

So the flower this generator hands you is the visible face of that deal. Every petal and colour and scent is a message to an animal, and the reason the world is full of flowers, and full of the insects that visit them, is that the two of them, long ago, learned to pay each other. The land that the mosses first crept onto in damp silence ended up painted in colour, and the paint is a business arrangement.

Where these come from

The plants are drawn from a list our team researched and checked by hand, spanning mosses, ferns, conifers and flowering plants, so these are real groups and species rather than approximations. Your browser picks from them at random. Nothing you do here leaves your device.

Questions people ask

Did Darwin really call flowers an "abominable mystery"?

Yes. In an 1879 letter to the botanist Joseph Hooker, Darwin described the rapid rise of flowering plants in the fossil record as "an abominable mystery". Their sudden appearance and swift diversification seemed to conflict with his gradualist view of evolution, and the puzzle genuinely bothered him. The phrase has been used ever since to describe the question of how flowering plants rose so fast.

Which plants in this list are the oldest kind?

The mosses and the fern relatives, including horsetails and clubmosses, represent the most ancient lineages here. Plants like them were among the first to colonise land and, later, to form the first forests, long before flowers or conifers existed. The living ones today are survivors of groups that are hundreds of millions of years old.

Why did flowering plants take over so successfully?

A major reason is their partnership with animal pollinators. By offering nectar and advertising it with colour and scent, flowers get their pollen carried directly from bloom to bloom by insects and other animals, which is far more efficient than the wind pollination older plants rely on. This co-evolution with pollinators is widely thought to be a key part of their explosive success.

Do any plants still use wind instead of animals?

Many do. Conifers like pines, along with grasses and quite a few trees, are wind-pollinated, releasing large quantities of pollen into the air. It is the reason for seasonal pollen clouds and much hay fever. Wind pollination is older and less targeted than the animal partnership the flowering plants developed, but it still works well for many species.

Is a flower really not just decoration?

Correct, it is a reproductive structure, not an ornament. A flower's colour, scent and shape are signals evolved to attract pollinating animals, and the nectar is the payment for their service. What looks to us like pure beauty is, from the plant's point of view, a highly practical system for getting pollen delivered, which happens to be beautiful as a side effect.

References

1. What is Darwin's "abominable mystery"? Center for Plant Conservation. https://saveplants.org/what-is-darwins-abominable-mystery/
2. Fossil history of flowering plants. Wikipedia. https://en.wikipedia.org/wiki/Fossil_history_of_flowering_plants
3. The Emergence of Flowers. Piedmont Master Gardeners. https://www.piedmontmastergardeners.org/article/the-emergence-of-flowers/