Note the thorn on the left. This vine forms impenetrable thickets in nearaby woods and preserves. The berries provide food for animals.
Greenbrier is a native plant which has become invasive, like deer, and has run rampant due to the lack of natural enemies to keep it in check. Periodic hot fires used to control it naturally. Now, fires are promptly put out due to the proximity of homes. Controlled burns are used, but have limited impact. Greenbier continues to flourish, crowding out native grasses.
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