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Una Heliconia nueva de Colombia
Volume 55, Page 14
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Notes on new and noteworthy plants. CLXXII
Volume 55, Page 41
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Additional notes on the Eriocaulaceae. XCVI
Volume 55, Page 57
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New species of Chionolaena and Stenocline from Brazil (Inuleae: Asteraceae)
Volume 55, Page 121
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Miscellaneous new species in the Pleurothallidinae (Orchidaceae)
Volume 55, Page 175
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Nomenclatural changes involving Wyoming grasses
Volume 55, Page 209
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Notes on new and noteworthy plants. CLXXIV
Volume 55, Page 232
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Update on the genus Jaegeria (Compositae--Heliantheae)
Volume 55, Page 243
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Additional notes on the Eriocaulaceae. XCVIII
Volume 55, Page 257
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A new species of Zamia L. (Zamiaceae, Cycadales) from Chiapas, Mexico
Volume 55, Page 299
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A new species of Chamaecrista sect. Absus (Caesalpiniaceae) from Bahia, Brazil
Volume 55, Page 305
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New phanerogam species from Chocó, Colombia
Volume 55, Page 365
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Nomenclatural notes on Aster (Asteraceae) -- II. New combinations and some transfers
Volume 55, Page 373
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Studies in the Heliantheae (Asteraceae). XXXII. New species of Wedelia from Brazil
Volume 55, Page 389
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Studies in the Heliantheae (Asteraceae). XXXIII. New species of Aspilia from South America
Volume 55, Page 415
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Aa (Orchidaceae) in Costa Rica
Volume 55, Page 443