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New names and combinations, principally in the Rocky Mountain flora--IV
Vol 55, Iss 1, Page 1
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Additions to the flora of Colorado--X
Vol 55, Iss 1, Page 10
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Una Heliconia nueva de Colombia
Vol 55, Page 14
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Karyotaxonomic studies on wild Bolivian tuber-bearing Solanum, sect. Petota. I
Vol 55, Page 17
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Notes on new and noteworthy plants. CLXXII
Vol 55, Page 41
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Additional notes on the Eriocaulaceae. XCV
Vol 55, Iss 1, Page 44
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Additional notes on the Eriocaulaceae. XCVI
Vol 55, Page 57
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A new Nymphaea variety discovered in south central Africa
Vol 55, Iss 2, Page 109
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Notes on Begoniaceae--IV
Vol 55, Iss 2, Page 112
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Notes on new and noteworthy plants. CLXXIII
Vol 55, Iss 2, Page 113
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New species of Chionolaena and Stenocline from Brazil (Inuleae: Asteraceae)
Vol 55, Page 121
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European black alder and other plants in coal-mine areas of western Kentucky
Vol 55, Iss 3, Page 127
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Certamen Melastomataceis XXXVII
Vol 55, Iss 3, Page 131
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Additional notes on the Eriocaulaceae. XCVII
Vol 55, Iss 3, Page 148
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Miscellaneous new species in the Pleurothallidinae (Orchidaceae)
Vol 55, Page 175
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Three new species of Heterotheca (Asteraceae--Astereae) from northern Mexico
Vol 55, Iss 3, Page 204
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Nomenclatural changes involving Wyoming grasses
Vol 55, Page 209
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Revision of the Hawaiian species of Santalum (Santalaceae). Hawaiian plant studies 109
Vol 55, Iss 4, Page 217
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Camelina rumelica, another weedy mustard established in North America
Vol 55, Iss 4, Page 227
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A new species of Argythamnia (Euphorbiaceae) from Mexico
Vol 55, Iss 4, Page 229
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Notes on new and noteworthy plants. CLXXIV
Vol 55, Page 232
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Neotropical Myrsinaceae-XL
Vol 55, Iss 4, Page 235
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Update on the genus Jaegeria (Compositae--Heliantheae)
Vol 55, Page 243
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A new record for Schizachyrium semitectum in Mexico
Vol 55, Iss 4, Page 252
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Observations on the floral structure of Dyssodia tenuiloba (DC. ) B. L. Robinson and Matricaria matrkarioides (Less. ) T. C Porter (Asteraceae)
Vol 55, Iss 4, Page 253
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Panicum capillare L. var. barbipulvinatum (Nash) comb. nov
Vol 55, Page 256
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Additional notes on the Eriocaulaceae. XCVIII
Vol 55, Page 257
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Additional notes on the genus Cornutia. VII
Vol 55, Page 276
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A new species of Mentzelia section Bartonia (Loasaceae) from western Nevada [M. candelariae]
Vol 55, Iss 5, Page 281
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Notes on new and noteworthy plants. CLXXV
Vol 55, Iss 5, Page 288
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Additions to the orchid flora of Cerro Marahuaca
Vol 55, Iss 5, Page 289
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Dos nomina nova para especies americanas de Dioscorea
Vol 55, Iss 5, Page 296
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Solanum venatoris (sect. Petota) a new species from Bolivia
Vol 55, Iss 5, Page 297
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A new species of Zamia L. (Zamiaceae, Cycadales) from Chiapas, Mexico
Vol 55, Page 299
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A new species of Chamaecrista sect. Absus (Caesalpiniaceae) from Bahia, Brazil
Vol 55, Page 305
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Notes on the genus Gmelina (Verbenaceae)
Vol 55, Page 308
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Helianthemum rosmarinifolium and Oenothera triloba in Louisiana
Vol 55, Iss 5, Page 343
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Mancreated stable low vegetation under a roadside utility line Norfolk, Connecticut
Vol 55, Iss 6, Page 345
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New phanerogam species from Chocó, Colombia
Vol 55, Page 365
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Notes on new and noteworthy plants. CLXXVI
Vol 55, Iss 6, Page 372
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Nomenclatural notes on Aster (Asteraceae) -- II. New combinations and some transfers
Vol 55, Page 373
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Studies in the Heliantheae (Asteraceae). XXXII. New species of Wedelia from Brazil
Vol 55, Page 389
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Studies in the Heliantheae (Asteraceae). XXXIII. New species of Aspilia from South America
Vol 55, Page 415
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Additional notes on the genus Gmelina. I
Vol 55, Page 424
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Aa (Orchidaceae) in Costa Rica
Vol 55, Page 443
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The algae of New Jersey (U. S. A. ) VI. Chlorophyta (green algae) A. Volvocales, Tetrasporales and Ulotrichales
Vol 55, Iss 7, Page 449
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Some observations on the aquatic vascular flora of the Hancock County, Illinois section of the Mississippi River
Vol 55, Iss 7, Page 455
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Additional notes on the genus Gmelina. II
Vol 55, Page 460
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A new species of Verbesina (sect. Verbesinaria) from Durango, Mexico
Vol 55, Iss 7, Page 500