CONTENTS 



Page. 



North American Species of Festuca. By Charles V. Piper 1 



Introduction 



Synopsis of United States and Canadian species 



Notes on Mexican species 42 



The Genus Ptelea ix the Western and Southwestern United States and 



Mexico. By Edward L. < rreene 49 



Introduction 4 ( .f 



Synopsis of the species 



Descriptions of the species : »~ 



Studies of Mexican and Central American Plant — So. - r >. By J. N. 1; 79 



Introductory notes 79 



Liliaceae B7 



Nymphaeaceae 93 



Ranunculaceae 



Rosaceae 95 



Mimosaceae 96 



Caesalpiniaceae 



Viciaceae 99 



Krameriaceae 107 



Geraniaceae 108 



Oxalidaceae L09 



Linaceae ' 117 



Balsamaceae 117 



Polygalaceae 122 



Malvaceae 123 



I Iv pericaceae 1 24 



Violaceae 125 



Cacta< eae 125 



Apiaceae 127 



Addendum 131 



The Leguminosae <>f Pokto Rico. By J. Perkins 133 



Introduction 133 



Synopsis of the genera. 134 



I descriptions of the genera and species 140 



Report on the Diatoms of the Albatross voyages iv the Pacific Ocean, 

 — 1-1904. By Albert Mann, assisted in the bibliography and citations by 



P. L. Ricker ' 



Introduction 221 



Annotated catalogue of genera and species 230 



Data of the station.- at which diatoms were collected by the Albatross ... 

 Bibli. >graphy 



The Cyperaceae of Costa Rica. By ('. B. Clarke 44:1 



Synoptical key to the genera 443 



Annotated catalogue of the genera and species 4 44 



45609—08 n i\ 



