National Geographic : 1936 Mar
C National Geographic Society Finlay Photograph byB.Anthony Stewart VAST CATTLE HERDS OFTEN GRAZE ACROSS THIS RANGE, COVERED NOW WITHROSE-PURPLE OWLCLOVER Though commonly known as "owlclover," the plant belongs to a family far removed from true clovers. Cattle grazing here often find theflowering "loco" mixed with good grasses. This is a habit-forming weed, inducing in cattle a form of insanity, just asnarcotics may stimulate and craze human addicts. State authorities help farmers to eradicate such noxious weeds.