RT Journal Article SR Electronic T1 A PLANT NEW TO THE UNITED STATES JF Science JO Science FD American Association for the Advancement of Science SP 637 OP 637 DO 10.1126/science.63.1643.637 VO 63 IS 1643 A1 Pellett, Frank C. YR 1926 UL http://science.sciencemag.org/content/63/1643/637.1.abstract AB