Buttonweed definitions

Buttonweed

• (n.) The name of several plants of the genera Spermacoce and Diodia, of the Madder family.
Found on http://thinkexist.com/dictionary/meaning/buttonweed/

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Buttonweed

But'ton·weed` noun (Botany) The name of several plants of the genera Spermacoce and Diodia , of the Madder family.
Found on http://www.encyclo.co.uk/webster/B/119

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