Zamia Roezlii

Zamia roezlii is a species of cycad, a plant in the Zamiaceae family. It is found in Colombia and Ecuador.

Named by the Czech botanist Benedikt Roezl.

A single sperm cell from Zamia roezlii is about 0.4 mm in length and is visible to the unaided eye, being the world's largest sperm.

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