science environmentIrrigon Oregon Offers Dollar Bounty For Prickly Invasive Weed By Amelia Templeton (OPB)June 14, 2014 9:02 p.m.📨 Daily news in your inboxSign up today for OPB’s “First Look” – your daily guide to the most important news and culture stories from around the Northwest.EmailPlease leave this field blankSign up