PREFACE 



In the preparation of the text for this volume the author gratefully acknowledges 

 his indebtedness to the following contributors: Roxana Stinchfield Ferris, for the 

 texts of the families Nyctaginaceae and Portulacaceae, also the genus Descurainia 

 in the family Brassicaceae ; Lyman Benson, for the genus Ranunculus; Rimo Baci- 

 galupi, for the Saxifragaceae ; and Charles Piper Smith, for the large and difficult 

 genus Lupinus. The text of the remaining families was written by the author. In its 

 preparation he is deeply indebted to his colleagues at the Dudley Herbarium of Stan- 

 ford University: Elmer D. Applegate has furnished many valuable specimens and 

 field notes, especially of plants in southern Oregon. Ira L. Wiggins has been con- 

 sulted many times on perplexing taxonomic and nomenclatorial problems. Roxana S. 

 Ferris has assisted in the selection of material for illustration, and, together with 

 Helena Barden, has checked the bibliographical references and read the manuscripts 

 and proofs. 



As in Volume I all the illustrations in this volume are original, except for those 

 species which are illustrated in Britton and Brown's Illustrated Flora of the Northern 

 United States and Canada. Privilege to use figures from this work was granted by 

 the New York Botanical Garden, and is hereby acknowledged with gratitude. Many 

 of the original figures were drawn by Jeanne Russel Janish, but Louise Nash drew 

 the Lupines, and Helen Edwards Bacon, Alice Baldwin Addicott, and William S. 

 Atkinson drew a number of species scattered through various plant families. 



Since this work was first projected the cost of printing has about doubled, but the 

 continuance of the work has been assured through the active interest of Chancellor 

 Ray Lyman Wilbur, who has secured funds from private sources to help meet the 

 increased cost of publication. 



L. R. A. 



Stanford University 



