Brian Paul, Natural Resource program manager with the LA District’s Operations Division (left) discusses bags of Dittrichia graveolens, or stinkwort, with LA District biologist Tiffany Armenta during a volunteer cleanup of the Santa Ana River Marsh, Sept. 23, in Newport Beach, Calif. Armenta hadn’t planned on uprooting any plants but ended up pulling 90 percent of the invasive weed. Curious volunteers taking a whiff of the stinkwort understood how it got its name.