单词	chaffweed
释义	chaffweed /ˈtʃafwiːd / noun [mass noun] A tiny European pimpernel with pink or white flowers. Anagallis minima, family Primulaceae. We have also found smooth boisduvalia and chaffweed under irrigation pivots in cultivated fields, and sand verbena is found in open, shifting sand dunes.... A. minima (chaffweed) is a small, spreading annual with alternate, oval, stalkless leaves. Alvan W. Chapman first collected chaffweed in the mid 1800s along the Caloosahatchee River (s.n., US), presumably in Lee County. Origin Mid 16th century: probably from the verb chafe + weed.
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