indigo

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Introduction References & Edit History Quick Facts & Related Topics

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Flower bingo

Britannica’s Flower Bingo

Plant seedlings emerging from rich fertile soil

Do Plants Feel Pain?

Discover

Russian grand duchess Anastasia; undated photograph. (Anastasiya Nikolayevna, Tsar Nicholas II)

Did Duchess Anastasia Survive Her Family’s Execution?

Close up of praying mantis walking on stone ground against a blurred background in Japan

6 Animals That Eat Their Mates

Flags of the countries of the world (flagpoles).

How Many Countries Are There in the World?

Queen Elizabeth II addresses at opening of Parliament. (Date unknown on photo, but may be 1958, the first time the opening of Parliament was filmed.)

All 119 References in “We Didn’t Start the Fire,” Explained

Figure 13: A Maxim machine gun, belt-fed and water-cooled, operated by German infantrymen, World War I.

7 Deadliest Weapons in History

Ahura Mazda - relief of the Zoroastrian god Ahura Mazda at the ancient ruins of Persepolis in Iran. Also known as Ormazd Zoroastrianism,

Which Religion Is the Oldest?

New Zealand. Political/Physical map. Includes locator.

Where Is “Old Zealand”?

indigo: Facts & Related Content

Written and fact-checked by The Information Architects of Encyclopaedia Britannica

Facts

Also Known As	Indigofera

Photos

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Topics

Natal indigo true indigo indigo Faboideae clover lupine wisteria Clianthus laburnum vetch broom gorse

Key People

Elizabeth Pinckney

British-American plantation manager

Quiz

Venus's-flytrap. Venus's-flytrap (Dionaea muscipula) one of the best known of the meat-eating plants. Carnivorous plant, Venus flytrap, Venus fly trap

Plants: From Cute to Carnivorous

Demystified

Plant seedlings emerging from rich fertile soil

Do Plants Feel Pain?