[prob. f. BLUE, in reference to the color: cf. F. bluet, applied to various flowers.] A kind of edible mushroom.

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1830.  Withering, Brit. Plants (ed. 7), IV. 192, note. This species [Agaricus violaceus] … is sold in Covent-Garden market under the name of Blewits, for making catsup.

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1871.  M. Cooke, Fungi (1874), 91. Lepista personata used to be sold in Covent Garden Market under the name of blewits.

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1883.  Gd. Words, 589/2. Chantarelles, and morells, and blewitts.

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