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The Collaborative International Dictionary
Sweetweed

Sweetweed \Sweet"weed`\, n. (Bot.) A name for two tropical American weeds ( Capraria biflora, and Scoparia dulcis) of the Figwort family.

Wiktionary
sweetweed

n. Either of two tropical American weeds ((taxlink Capraria biflora species noshow=1) and (taxlink Scoparia dulcis species noshow=1)) of the figwort family.