Plural of carex, a botanical genus of sedge plants (grass-like plants often found in wetlands).
From Latin 'carex,' an ancient Latin name for sedge plants. The plural 'carices' follows the Latin third-declension pluralization pattern (like 'index/indices').
Sedges look like grasses but they're not—the old botanical rhyme goes 'Sedges have edges, rushes are round, grasses are hollow and make a swishy sound!'
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