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New names is Dalea and Marina (Fabaceae tribus Amorpheae)
Vol 26, Iss 1, Page 1
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Certamen Melastomataceis XXI
Vol 26, Iss 1, Page 3
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A new species of Galium (Rubiaceae) from Guatemala
Vol 26, Page 12
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Additional notes on the Eriocaulaceae. XLIII
Vol 26, Page 15
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Sudies in Ichnanthus (Gramineae). III. Additional new taxa in section Foveolata
Vol 26, Page 57
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Schlegelia costaricensis: a familial transfer to Boraginaceae
Vol 26, Page 67
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TRIBAL REVISIONS IN THE ASTERACEAE PART 5 THE RELATIONSHIP OF RIGIOPAPPUS
Vol 26, Page 69
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TRIBAL REVISIONS IN THE ASTERACEAE PART 6 THE RELATIONSHIP OF ERIACHAENIUM
Vol 26, Page 71
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TRIBAL REVISIONS IN THE ASTERACEAE PART 7 THE RELATIONSHIP OF ISOETOPSIS
Vol 26, Page 73
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TRIBAL REVISIONS IN THE ASTERACEAE PART 8 A NEW TRIBE URSINIEAE
Vol 26, Page 76
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Fourth expedition to Nicaragua
Vol 26, Page 86
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The range of Prunus amerciana in New England
Vol 26, Iss 2, Page 97
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New taxa and combinations in Machaerium (Leguminosae). IV
Vol 26, Page 100
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THE TOWSON STATE HERBARIUM FAMILY INDEX
Vol 26, Page 103
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Two new gypsophilous species of Machaeranthera [M. crutchfledii, M. gypsophila] (Asteraceae-Astereae) from north-central Mexico
Vol 26, Iss 2, Page 116
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Sommera (Rubiaceae) in North America
Vol 26, Page 121
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Tropical American plants. XIV
Vol 26, Page 127
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Notes on the flora of Costa Rica, 2. Hedyosmum of the Chloranthaceae
Vol 26, Page 131
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ADDITIONAL NOTES ON THE ERIOCAULACEAE PART 44
Vol 26, Page 136
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Tribal revisions in the Asteraceae. IX. The relationship of Ischnea
Vol 26, Page 153
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TRIBAL REVISIONS IN THE ASTERACEAE PART 10 THE RELATIONSHIP OF PLAGIOCHEILUS
Vol 26, Page 159
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TRIBAL REVISIONS IN THE ASTERACEAE PART 11 A NEW TRIBE EREMOTHAMNEAE
Vol 26, Page 163
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Studies in the Eupatorieae (Asteraceae). CXII. A new species of Ferreyrella [F. cuatrecasassi]
Vol 26, Iss 3, Page 167
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Studies in the Eupatorieae (Asteraceae). CXIII. A new genus, Matudina
Vol 26, Page 170
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NEW COMBINATIONS IN THE CACTACEAE SUBFAMILY OPUNTIOIDEAE
Vol 26, Page 175
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Notes on new and noteworthy plants. LIX
Vol 26, Page 177
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Additional notes on the Eriocaulaceae. XLV
Vol 26, Page 179
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The combination of Begonia fuchsiaefolia (A. DC.) Warburg
Vol 26, Page 217
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Transfer of Relbunium sphagnophilum (Rubiaceae) and R. mazocarpum to Galium
Vol 26, Page 221
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NOTES ON NEW AND NOTEWORTHY PLANTS PART 60
Vol 26, Page 224
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ADDITIONAL NOTES ON THE ERIOCAULACEAE PART 46
Vol 26, Page 226
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Geophila (Rubiaceae) in North America
Vol 26, Page 263
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Studies in Mexican and Central American Solanaceae
Vol 26, Page 265
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A new Swartzia from Suriname
Vol 26, Page 279
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Field and garden studies in Crotalaria sagittalis L. and related species
Vol 26, Page 289
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NOTES ON NEW AND NOTEWORTHY PLANTS PART 61
Vol 26, Page 355
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A 5TH SUMMARY OF THE VERBENACEAE AVICENNIACEAE STILBACEAE DICRASTYLIDACEAE SYMPHOREMACEAE NYCTANTHACEAE AND ERIOCAULACEAE OF THE WORLD AS TO VALID TAXA GEOGRAPHIC DISTRIBUTION AND SYNONYMY SUPPLEMENT 3
Vol 26, Page 356
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ADDITIONS TO THE GENUS TAGETES HELENIEAE ASTERACEAE
Vol 26, Page 378
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Synopsis of the genus Philoglossa (Liabeae, Asteraceae)
Vol 26, Page 381
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2 ADDITIONAL NEW SPECIES OF APHELANDRA ACANTHACEAE
Vol 26, Page 393
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Certamen Melastomataceis XXII
Vol 26, Page 397
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NOTES ON NEW AND NOTEWORTHY PLANTS PART 62
Vol 26, Page 409
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Supplemental characterization of genus Pseudoconyza (Compositae, Inuleae-Plucheinae)
Vol 26, Page 410
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STUDIES ON THE LICHEN FAMILY THELOTREMATACEAE PART 1
Vol 26, Page 413
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Notes on the flora of Costa Rica,3. New species in the Moraceae
Vol 26, Page 421
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A new Spiranthes (Orchidaceae) from Guatemala
Vol 26, Page 435
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Studies in Bignoniaceae IX: New species of Dendrosicus and Pachyptera
Vol 26, Page 439
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Studies in the Senecioneae (Asteraceae). I. A new genus, Pittocaulon
Vol 26, Page 451
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A new species of Senecio [S. chirripoensis] from Costa Rica
Vol 26, Iss 6, Page 454
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Additional notes on the Eriocaulaceae. XLVII
Vol 26, Iss 6, Page 455
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A new species of Brunellia from Panama
Vol 26, Page 485
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Tropical American plants, XV
Vol 26, Page 487