A genus of tropical American plants in the legume family, known for their small leaflets and delicate flowers.
From Greek 'chamae' (low) and 'crista' (crest), referring to the plant's low-growing habit and distinctive crest-like flower structures. Named scientifically in the 18th century.
Some species in this genus are so sensitive to touch that their leaves fold up instantly—they're like the shy cousins of plants, and scientists still aren't entirely sure why they do this defensive move.
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