Question: Couldn't find this plant in any of our publications (even weeds?) has tough burrs around each berry, worked at Science …
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Question
Couldn't find this plant in any of our publications (even weeds?) has tough burrs around each berry, worked at Science Center gardens, herbs, pollinators in Norwell MA
Answer
Gardener514, you've photographed a species of Agrimonia (agrimony), members of the rose family. The burr is made up of relatively soft bristles that surround the hypanthium. I can't tell you which species you have without seeing additional images of the plant, but based on the hypanthium, you likely have Agrimonia gryposepala (common agrimony).
