sea-urchin cactus

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Easter lily cactus

sea-urchin cactus

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Plant seedlings emerging from rich fertile soil

Do Plants Feel Pain?

Flower bingo

Britannica’s Flower Bingo

Macro image of pollen-covered bee on purple crocus. (flowers, stamen, pollination, insects, nature)

5 Fast Facts About Flower Anatomy

Anemone coronaria, the poppy anemone, Spanish marigold, or windflower, is a species of flowering plant.

What’s the Difference Between Angiosperms and Gymnosperms?

Frost. Frost point. Hoarfrost. Winter. Ice. Blackberry plant. Thorn. Hoarfrost on blackberry thorns.

Botanical Barbarity: 9 Plant Defense Mechanisms

Discover

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

6 Animals That Eat Their Mates

NBA Lakers Celtics Finals Kevin Garnett shooting.

10 Great Sports Rivalries

"Landing of Columbus" by John Vanderlyn, oil on canvas; commissioned 1836/1837, placed 1847. In the rotunda of the U.S. Capitol, Washington, D.C. 12' x 18' ft. (3.66 m. x 5.49 m.) Christopher Columbus and members of his crew are shown on a beach

5 Unbelievable Facts About Christopher Columbus

green digital binary symbols

What Comes After Terabyte?

Monitor. Varanus salvadorii is a monitor lizard found in New Guinea can grows to 2.7 metres (9 ft.) aka Tree crocodile, Crocodile monitor, Salvadori's monitor, artellia, reptile

7 of the World’s Most Dangerous Lizards and Turtles

Nelson Mandela, undated photo.

15 Nelson Mandela Quotes

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

Did Duchess Anastasia Survive Her Family’s Execution?

sea-urchin cactus: Facts & Related Content

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

Facts

Also Known As	Echinopsis

Photos

Easter lily cactus

sea-urchin cactus

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Topics

golden torch Peruvian torch cactus Easter lily cactus cactus Rhipsalis Opuntia cholla beehive cactus Schlumbergera cereus moonlight cactus chin cactus Pereskia living-rock cactus

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?