Day 285: The plant shown in this image provides a classic example of why I dislike common names. It is not even in the same family as garden marigolds (Asteraceae), so why is it called "Marsh Marigold?" Caltha leptosepala belongs to the family Ranunculaceae, alongside buttercups, anemones and hellebores, among others. Its Latin designation "leptosepala" refers to its narrow sepals, that portion of the flower which encloses the emerging bud and serves as protection for it. In a diagram of the parts of a flower, the sepals form the first whorl and are usually green or greenish. Here, the Latin epithet provides a useful clue to identifying the plant in the field, whereas the most frequently used common name would lead you thoroughly astray. But all is not lost. It's also known as "Elkslip" which, if you think about it, makes more sense.
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