comb. form of UNDULATE a., used in some botanical terms, as undulato-rugose, -striate.

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1829.  Loudon, Encycl. Plants (1836), 1027. Stromatosphæria deusta;… rigid spreading thick undulato-rugose.

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1866.  Treas. Bot., 1191/1. Undulato-striate.

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