sky weed
n.— «Happy Valley had two other pluses: the absence of a homeowners association, “which adds another layer of bureaucracy and red tape,” and a dearth of palm trees (“sky weeds,” as Schroeder calls them), which tend to give away a California locale.» —“They like the cameras and action” by Richard Verrier Los Angeles Times June 11, 2007. (source: Double-Tongued Dictionary)