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A SYNOPSIS OF THE NORTH AMERICAN SPECIES OF SORBUS
Volume 20, Page 1
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NEW AND NOTEWORTHY SPECIES OF ASIATIC JASMINUM
Volume 20, Page 64
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BOTANICAL RESULTS OF THE ARCHBOLD EXPEDITIONS NEW GUINEA RECORDS OF ANNONACEAE AND MENISPERMACEAE
Volume 20, Page 73
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BOTANICAL RESULTS OF THE ARCHBOLD EXPEDITIONS NEW AND NOTEWORTHY PAPUAN SCROPHULARIACEAE. II
Volume 20, Page 75
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NEW SPECIES, VARIETIES AND COMBINATIONS FROM THE COLLECTIONS OF THE ARNOLD ARBORETUM
Volume 20, Page 85
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ADDITIONAL NOTES ON CHINESE MYRTACEAE
Volume 20, Page 102
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A REVIEW AND EXTENSION OF OUR KNOWLEDGE OF CALYPTOSPORA GOEPPERTIANA KUEHN
Volume 20, Page 104
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THYRONECTRIA DENIGRATA (WINTER) SEAVER, THE CAUSE OF DISEASE IN GLEDITSIA
Volume 20, Page 114
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THE VEGETATIVE PROPAGATION OF DIFFICULT PLANTS
Volume 20, Page 116
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BIBLIOGRAPHICAL NOTE ON "EHRH. PLANTAG."
Volume 20, Page 137
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VII. INTERNATIONAL BOTANICAL CONGRESS STOCKHOLM, 1940
Volume 20, Page 138
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ON THE BRASS COLLECTIONS OF PANDANACEAE FROM NEW GUINEA
Volume 20, Page 139
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PALMAE GESAMMELT IN NEU GUINEA VON L. J. BRASS
Volume 20, Page 187
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NEW CYPERACEAE FROM NEW GUINEA
Volume 20, Page 213
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NEW IXORA SPECIES FROM THE SOLOMON ISLANDS
Volume 20, Page 216
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NEW RECORDS OF STYRAX AND CASUARINA FROM THE SOLOMON ISLANDS
Volume 20, Page 220
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TWO NEW SPECIES OF OPPOSITE-LEAVED ILEX FROM BORNEO
Volume 20, Page 222
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PRELIMINARY NOTES ON ASIATIC—POLYNESIAN SPECIES OF ERYTHRINA
Volume 20, Page 225
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NEW PHANEROGAMS FROM MEXICO
Volume 20, Page 234
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NEW FUCHSIAS FROM SOUTHERN PERU
Volume 20, Page 241
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DOS ESPECIES NUEVAS PARA EL NORTE DE CHILE
Volume 20, Page 245
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CLYMENIA AND BURKILLANTHUS, NEW GENERA ALSO THREE NEW SPECIES OF PLEIOSPERMIUM (RUTACEAE—AURANTIOIDEAE)
Volume 20, Page 250
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ADDITIONAL NOTES ON HOUTTUYN'S BINOMIALS
Volume 20, Page 264
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Proposed amendments to the international rules of botanical nomenclature
Volume 20, Page 269
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The firs of Mexico and Guatemala
Volume 20, Page 281
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Papuan grasses collected by L. J. Brass, II
Volume 20, Page 304
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Studies in the Boraginaceae, XIII. New or otherwise noteworthy species chiefly from the western United States
Volume 20, Page 375
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FURTHER NOTES ON JASMINUM
Volume 20, Page 403
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INDEX
Volume 20, Page 465