“…Thes. Indiana Univ., Bloomington, 1960) stem between the apical meristem and fifth internode of and Fox and Miller (1960) found that Xanthium callus 10-week old plants. The stem segments were placed in -vi^ould grow on a basal medium consisting of inorganic 15 o/^ Clorox for 20 min, rinsed three times with sterile salts, sucrose, glycine, and vitamins if it was supple-glass-distilled water, placed in 70 Vo ethanol for 3 min, iTiented with kmetin, an auxin, and corn steep water, a and then rinsed with sterile, glass-distilled water.…”