Adaptation and origin in the plant world : The role of environment in evolution / by Frederic E. Clements, Emmett V. Martin and Francis L. Long. Clements,Frederic E. Martin, Emmett V. Long, Francis L. Plant genetics Plant mutation 580 CLA Includes bibliographical references and index. Waltham : The Chronica Botanica , c1950 . c1950 . 1950 Text xii, 332 p. : eng