Blue Lotus Leaves, Root and Flower: What the Ancients Actually Used

The question nobody asks

Almost everything written about Blue Lotus is about the flower. The petals, the colour, the scent, the dried blossoms sold in bags.

So here is a question that almost nobody asks. When the ancient sources describe people actually using this plant, which part of it do they name?

The answer, in text after text, is not the flower.

What follows is history, not advice. The ancient uses below are described so they can be understood, and none of them is a recommendation.

What the Egyptian medical papyri prescribe

The Egyptians’ own medical record is the best place to start, because it is their evidence rather than a foreigner’s report.

The Ebers Papyrus holds five genuine lotus prescriptions. Three were drunk, in beer, in water, or in wine with sweet beer. Their stated purposes were a blockage on the right side, something called poison-seed in the belly and heart, and a treatment for the liver.

In every one, the lotus is one ingredient among many, at a small measured amount. One recipe has sixteen ingredients. These are not lotus preparations. They are compound remedies that contain some lotus.

The standard reference work, the Wörterbuch der ägyptischen Drogennamen of 1959, adds a sixth use from another papyrus. It was an enema.

And the only recipe in the whole Egyptian medical corpus that uses the lotus on its own is not medicine at all. It is a curse: a lotus part burned to ash and smeared on an enemy’s scalp, to make their hair fall out.

I mention it because anyone building a story about Egyptian lotus medicine on the Ebers Papyrus should read that recipe first. I have written more about the papyrus itself in the article on the Ebers Papyrus.

One word, three readings

The part of the plant these recipes name is written with one Egyptian word, ḫꜣw. What it means depends on which specialist you read.

The 1959 drug dictionary reads it as the leaves, and specifically the large floating leaves. Wolfhart Westendorf, in his 1999 handbook of Egyptian medicine, and Renate Germer, a specialist in the plants of ancient Egypt, read it as the edible root. Heinrich Joachim, translating the same prescriptions in 1890, read it as the blossom.

So I will not tell you the Egyptians ate the leaves, or ate the root. Both statements go further than the evidence.

What can be said is that the ingredient is disputed, and that two of the three scholarly readings point below the flower.

What the Greeks and Romans describe

The Greek and Roman writers are much clearer, and they all point to the same place. The root.

Herodotus, writing in the fifth century BC about the Egyptian lotus, says: “The root of this lotus is edible also, and of a sweetish taste; it is round, and the size of an apple.” He also describes the seed head being baked into bread.

A classic commentary on Herodotus from 1912 adds that the plant came in two kinds, the white and the blue, and that it was actually cultivated for food. The blue water lily, on that reading, was a root crop.

Dioscorides, the great Greek writer on medicinal plants in the first century AD, describes the water lily’s root being drunk, among other things with wine. The subject of his sentence, in the Greek, is the root.

Pliny the Elder, in the same century, says the plant was also called rhopalon, a club, after the shape of its root.

Four ancient descriptions, four references to the root, and not one ancient account of drinking the flower.

Where the flower actually goes

If the flower is not eaten or drunk in the ancient record, what happens to her?

A survey of every lotus-bearing sentence recoverable from two large digital corpora of Egyptian texts, 251 sentences in all, gives a clear picture. The flower is worn, offered, carried, and above all held at the nose and smelled. She appears in medicine only twice, and one of those is a comparison.

None of the 251 sentences puts any part of the lotus in a human mouth, except inside a medical dosage list. One even separates the two in a single line: one plant “is at the mouth”, while “a lotus blossom is at the nostril”.

In the Ptolemaic temple laboratory at Edfu, the flower’s essence goes into a sacred oil, and a lotus bud probably scents an ointment used to anoint a god’s statue. Scent again. I describe that room in the article on the Edfu laboratory.

Across every register the archive holds, the flower’s documented ancient role is fragrance.

What modern science has tested

Modern chemistry has done the opposite of the ancients. It has studied the flower again and again.

The most thorough survey yet, published in Scientific Reports in December 2025 by a team at Cairo University, profiled the organs of authenticated Egyptian blue lily: flower, leaf and stem. It annotated about 185 compounds. I cover what it found in the article on what Blue Lotus contains.

It did not include the root.

One study, in 2021, examined the rhizome of a related water lily. It was boiled first, and the paper reports no alkaloid data of any kind.

There is an irony here. The one early laboratory result that set off decades of claims about Blue Lotus chemistry came from dried rhizome, analysed once in the 1970s, never published and never repeated. I trace that story in the article on Blue Lotus and apomorphine.

The gap, stated plainly

Put the pieces side by side and a pattern appears.

The Egyptian medical papyri name a disputed part that most readings place below the flower. The Greek and Roman writers name the root. The flower herself, in the ancient record, is scent. And modern chemistry has tested the flower exhaustively, the leaf once, and the root not at all.

That is not a claim that the root does anything. Nobody knows, because nobody has looked.

It is simply the shape of the evidence. The part of the plant the ancient texts talk about is the part the laboratory has never examined.

For the fuller picture of the plant and her history, start with the complete guide to Blue Lotus.

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