Foster, Adriance S. Comparative morphology of vascular plants / Adriance S. Foster and Ernest M. Gifford. - San Francisco : W. H. Freeman, c 1959. - xi, 555 p. : ill. ; 23 cm. - A Series of books in biology. . Includes index. Includes bibliographical references : p. 538-39. 319 319 LCCN: 58010301 Subjects--Topical Terms: Plant morphology. Dewey Class. No.: 587 / F423c