a plant that can survive and grow in extremely cold or frozen environments.
From Greek 'kryos' (cold) + 'phyte' (plant), following the pattern of '-phyte' plant names like 'epiphyte' (plant that grows on other plants).
Arctic mosses and lichens are cryophytes that grow so slowly—sometimes just millimeters per year—that some patches in the Arctic Circle might be thousands of years old and still look tiny.
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