AVALON, Calif. - A species of grass not seen since 1912 has been discovered growing on Santa Catalina Island off the Southern California coast, botanists say. The plant, California dissanthelium, had long been thought extinct until a botanist recently spotted the wispy, 7-inch-tall tufts while hiking in Cottonwood Canyon. "I saw a little grass, and I thought, 'Hmm, that doesn't look familiar,'" said Jenny McCune, an assistant plant ecologist for the Catalina Island Conservancy. McCune found the grass on March 30 in an area of the canyon hit by fire two years ago. Scientists confirmed the plant's identity last month....