I have a single stem red vine with purple berries growing on it. It is in a cluster of bushes and gets mostly morning and early afternoon sun. The berries also have small bumps at the stem. I have lived here for 2 years and this is the first that I have seen this vine.
This is not a vine, but your description of the red stem with purple berries makes Mr. Smarty Plants think of Phytolacca americana (American pokeweed) or Phytolacca americana var. americana (American pokeweed). We have had many identification queries (with submitted photos) about these plants this year. It has been a very good year for them. If this doesn't happen to be what you saw, please send us photos and we will do our best to identify your plant. Visit the Ask Mr. Smarty Plants' Plant Identification page to read instructions for submitting photos for identification.
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