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Flower that opens at night - Ask Extension

Hi. I have a plant in my yard that has flowers that open at night. It also has ball like fruit with prickles.

This work is supported in part by New Technologies for Ag Extension grant no. 2020-41595-30123 from the USDA National Institute of Food and Agriculture. Any opinions, findings, conclusions, or recommendations expressed in this publication are those of the author(s) and do not necessarily reflect the view of the U.S. Department of Agriculture.