No. 1 (pp. 1-64) issued September 6, 1920.
No. 2 (pp. 65-128) issued November 19, 1920.
No. 3 (pp. 129-184) issued April 5, 1921.
No. 4 (pp. 185-246) issued January, 1922.

TABLE OF CONTENTS

NOTES ON AMERICAN WILLOWS. IX. By Camillo Schneider....

A PHYTOGEOGRAPHICAL SKETCH OF THE LIGNEOUS FLORA OF FOR-

MOSA. By E. H. Wilson...

NEW SPECIES, VARIETIES AND COMBINATIONS FROM THE HERBAR-

IUM AND THE COLLECTIONS OF THE ARNOLD ARBORETUM. By

Alfred Rehder

1

25

42

NOTES ON AMERICAN WILLOws. X. By Camillo Schneider..

THE LIGNEOUS FLORA OF THE STAKED PLAINS OF TEXAS.

Ernest J. Palmer..

65

By

90

A NEW SPECIES OF PISTACIA NATIVE OF SOUTHWESTERN TEXAS,

P. TEXANA. By Walter T. Swingle...

105

A NEW SPECIES OF CAMPNOSPERMA FROM PANAMA. By Paul

Standley...

NOTES ON NORTH AMERICAN TREES. VII. By C. S. Sargent.

NEW SPECIES, VARIETIES AND COMBINATIONS FROM THE HERBARIUM

AND THE COLLECTIONS OF THE ARNOLD ARBORETUM. By Alfred

Rehder.

111

112

121

BOTANICAL RECONNAISSANCE OF SOUTHERN ILLINOIS. By Ernest

J. Palmer.

129

PHILADELPHUS VERRUCOSUS SPONTANEOUS IN ILLINOIS. By Alfred

Rehder...

153

AZALEA OR LOISELEURIA. By Alfred Rehder

156

THE "INDIAN AZALEAS" AT MAGNOLIA GARDENS. By E. H. Wilson 159

NOTES FROM AUSTRALASIA. I. By E. H. Wilson..

NOTES ON NORTH AMERICAN TREES. VIII. By C. S. Sargent 164

NEW SPECIES, VARIETIES AND COMBINATIONS FROM THE HERBARIUM

AND THE COLLECTIONS OF THE ARNOLD ARBORETUM. By Alfred

Rehder.

160

174

BIBLIOGRAPHICAL NOTES. I. By Ethelyn M. Tucker

NOTES ON AMERICAN WILLOWS. XI. By Camillo Schneider..

A LIST OF THE TREES OF LOUISIANA. By R. S. Cocks..

THE FOREST FLORA OF THE OZARK REGION. By Ernest J. Palmer..

NOTES FROM AUSTRALASIA. II. By E. H. Wilson..

BIBLIOGRAPHICAL NOTES. II. By Ethelyn M. Tucker..

1