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A NEW SUBSPECIES AND OTHER NOMENCLATURAL CHANGES IN THE SOLIDAGO-ARGUTA COMPLEX
Vol 28, Page 1
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NOTES ON MEO AND YAO POPPY CULTIVATION
Vol 28, Page 5
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NOTES ON BRAZILIAN POLYGALACEAE
Vol 28, Page 10
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A new Hyaloscypha [H. cincinnata] from New York
Vol 28, Iss 1, Page 15
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Epiphyllum steyermarkii, a new Cactaceae from Venezuela
Vol 28, Iss 1, Page 17
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Tillandsia adamsii, a new Jamican species
Vol 28, Iss 1, Page 21
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Notes on Bromeliaceae, XXXV. Key to Tillandsia and simulators, supplement II
Vol 28, Iss 1, Page 24
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Studies in the Liabeae (Asteraceae)---II. Preliminary survey of the genera
Vol 28, Page 43
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Additions to the genus Taxiphyllum (Hypnaceae, Musci)
Vol 28, Page 64
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Studies in the Eupatorieae (Asteraceae)---CXX. Additions to the genus Koanophyllon in Panama
Vol 28, Page 67
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Studies in the Eupatorieae (Asteraceae)---CXXI. Additions to the genus Fleischmannia
Vol 28, Page 73
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Studies in the Eupatorieae (Asteraceae) CXXII. A new genus Sartorina
Vol 28, Page 97
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Notes on new and noteworthy plants--LXVI
Vol 28, Iss 1, Page 101
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ADDITIONAL NOTES ON THE GENUS VERBENA PART 19
Vol 28, Page 104
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Catalogus Euphorbiarum 1973
Vol 28, Iss 2, Page 121
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Combretum laxum Jacq. var. epiphyticum (Combretaceae) a case of selection for water dispersal
Vol 28, Page 188
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Notes on new and noteworthy plants. LXVII
Vol 28, Iss 2, Page 192
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Additional notes on the genus Verbena. XX
Vol 28, Page 195
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Tropical American plants, XVI
Vol 28, Page 225
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New Peruvian Gesneriaceae
Vol 28, Page 233
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ADDITIONAL NOTES ON THE GENUS VERBENA PART 21
Vol 28, Page 241
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NEW SPECIES OF PARMELIA LICHENS FROM TROPICAL AMERICA PART 1
Vol 28, Page 265
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Studies in the Eupatorieae (Asteraceae)---CXXIII. Additions to the genus Mikania
Vol 28, Page 272
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Studies in the Eupatorieae (Asteraceae)---CXXV. Additions to the genus Bartlettina
Vol 28, Page 286
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STUDIES IN THE SENECIONEAE ASTERACEAE PART 6 THE GENUS ARNOGLOSSUM
Vol 28, Page 294
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Notes on Archibaccharis (Compositae-Astereae)
Vol 28, Page 296
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Notes on new and noteworthy plants. LXVIII
Vol 28, Iss 3, Page 303
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Noteworthy grasses from Mexico II
Vol 28, Page 313
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Notes on Bromeliaceae, XXXVI
Vol 28, Page 319
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NEW COMBINATIONS IN THE LICHEN GENUS PARMOTREMA-SPP NEW-COMBINATION
Vol 28, Page 334
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DELIMITATION OF THE LICHEN GENUS HYPOTRACHYNA-SPP NEW-COMBINATION NEW-STATUS
Vol 28, Page 340
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Notes on new and noteworthy plants. LXIX
Vol 28, Iss 4, Page 401
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Flotsam and jetsam of Canton Atoll, South Pacific
Vol 28, Page 405
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Spothodea in Hawaii
Vol 28, Iss 4, Page 419
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A fifth summary of the Verbenaceae, Avicenniaceae, Stilbaceae, Dicrastylidaceae, Symphoremaceae, Nyctanthaceae, and Ericaulaceae of the World as to valid taxa, geographic distribution, and synonymy, Supplement 4
Vol 28, Iss 5, Page 425
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NOTES ON NEW AND NOTEWORTHY PLANTS PART 70
Vol 28, Page 466
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A new Micronesian Terminalia [T. rostrata] (Combretaceae)
Vol 28, Iss 5, Page 469
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A new variety of Fagraea berteriana (Gentianaceae)
Vol 28, Iss 5, Page 470
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A new slipper flower [Calceolaria paucifolia] from southern Peru
Vol 28, Iss 5, Page 473
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A résumé of the genus Tipuana (Leguminosae)
Vol 28, Iss 5, Page 475
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Bulbothrix, Parmelina, Relicina, Xanthoparmelia, four new genera in the Parmeliaceae (Lichenes)
Vol 28, Iss 5, Page 479
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Studies in the Eupatorieae (Asteraceae)---CXXVI. A new species of Ageratum
Vol 28, Page 491
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Studies in the Eupatorieae (Asteraceae). CXXVIII. Four additions to the genus Ageratina from Mexico and Central America
Vol 28, Page 494