Question: Unknown plant that has appeared in flower garden in North Waltham, Mass. plants are approaching 4 feet tall.
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Question
Unknown plant that has appeared in flower garden in North Waltham, Mass. plants are approaching 4 feet tall.
Answer
Dear msprofita, your plant is a goldendrod (genus Solidago) in the section triplenervae. This group includes Solidago canadensis (Canada goldenrod) and Solidago altissima (tall goldenrod). I can't discern the two species apart with the images provided, but hopefully that will give you enough information for your purposes.
