160Want local news?Sign up for the Localist and stay informed Something went wrong. Please try again.subscribeCongratulations! You’re all set! A mysterious and potentially poisonous weed previously unseen before in California has Los Angeles County Arboretum officials scratching their heads and wondering, “Where did this thing come from?” Arbortorium employees said a man calling himself “Robert” showed up at the non-profit botanic gardens Monday with a freshly-cut, two-and a-half-foot plant brach complete with thorns and unrippened fruit. So far, nothing out of the ordinary for an arboratorium — where patrons often bring unknown plants for identification, said botonist Frank McDonough. But when he took a close look at his subject and its oddly patterned green fruit, McDonough knew things were going to get a little less routine around the office. AD Quality Auto 360p 720p 1080p Top articles1/5READ MOREThe Christmas Truce of 1914 proved that peace is possible With a little help from Google Images, McDonough quickly identified the species as Soda Apple – a weed typically known for wreking havoc in the South East. While pervasive elsewhere, the weed had never been found growing in California. McDonough was anxious to learn how it got on his desk — and if there’s more. “If this thing is spreading, it could cause a real problem,” he said.