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A Synopsis of Acmena DC., a Valid Genus of the Myrtaceae
Vol 19, Iss 1, Page 1
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New or noteworthy Indo-Chinese plants
Vol 19, Iss 1, Page 21
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New Species, Varieties and Combinations from the Herbarium and the Collections of the Arnold Arboretum
Vol 19, Iss 1, Page 71
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Notes on some Astragalus species of Ecuador and Peru
Vol 19, Iss 1, Page 88
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A Misinterpreted Formosan Species, Euphorbia calonesiaca, Spec. Nov
Vol 19, Iss 1, Page 97
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On the Indo-Chinese Species of Syzygium gaertner
Vol 19, Iss 2, Page 99
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Some undescribed species from Mexico and Guatemala
Vol 19, Iss 2, Page 117
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New Species of Bauhinia from China
Vol 19, Iss 2, Page 129
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Notes on Chinese Euphorbiaceae
Vol 19, Iss 2, Page 134
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Nomenclatural Notes on Hypericum
Vol 19, Iss 2, Page 149
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Cytological evidence on the status of the genus Chamaecrista Moench
Vol 19, Iss 2, Page 153
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The Effect of Colchicine on Somatic Cells of Tradescantia paludosa
Vol 19, Iss 2, Page 158
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Pucciniastrum on Epilobium and Abies
Vol 19, Iss 2, Page 163
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Botanical Results of the Archbold Expeditions, IX. Notes on the Vegetation of the Fly and Wassi Kussa Rivers, British New Guinea
Vol 19, Iss 2, Page 175
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The Myrtaceae of China
Vol 19, Iss 3, Page 191
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New or noteworthy plants from temperate South America
Vol 19, Iss 3, Page 248
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New species, varieties and combinations from the collections of the Arnold Arboretum
Vol 19, Iss 3, Page 264
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Nomenclatural Notes on Hypericum
Vol 19, Iss 3, Page 279
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Seven Binomials Proposed As Nomina Ambigua
Vol 19, Iss 3, Page 282
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A Critical Consideration of Houttuyn's New Genera and New Species of Plants, 1773-1783
Vol 19, Iss 4, Page 291
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The species of Sisyrinchium in Uruguay, Paraguay and Brazil
Vol 19, Iss 4, Page 376
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The Biology of Rusts of the Genus Uredinopsis
Vol 19, Iss 4, Page 402
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The Relation Between Stomata Counts and Chromosome Number
Vol 19, Iss 4, Page 437
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The Effect of Colchicine on the Developing Embryo Sac of Tradescantia paludosa
Vol 19, Iss 4, Page 442
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The Arnold Arboretum During the Fiscal Year Ended June 30, 1938
Vol 19, Iss 4, Page 446
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Corrections
Vol 19, Iss 4, Page 462
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Index [Vol. 19]
Vol 19, Iss 4, Page 463