Critical comments on the types of two 19th-century North American plant names Pedro Jiménez-MejíasRobert F. C. Naczi OriginalPaper 22 April 2019 Pages: 123 - 128
Expanding the distribution of Macroclinium (Oncidiinae, Orchidaceae) and rediscovery of M. roseum Edlley Max PessoaVinícius BritoMarccus Alves OriginalPaper 03 December 2018 Pages: 129 - 133
The rediscovery of Griffinia alba (Amaryllidaceae), a poorly known and endangered species Antonio Campos-RochaAlan W. MeerowDanilo Antonio Viana Lima OriginalPaper 15 February 2019 Pages: 134 - 143
A new species, new synonyms, typifications, and a name correction in Neomarica from Brazil (Trimezieae, Iridaceae) André dos Santos Bragança GilClimbiê Ferreira HallMaria do Carmo Estanislau do Amaral OriginalPaper 20 February 2019 Pages: 144 - 155
Echeveria sonianevadensis (Crassulaceae), una nueva especie del Volcán Nevado de Colima del occidente de México y una clave para la serie Gibbiflorae H. David Jimeno-SevillaJ. Antonio Vázquez-Garcíay José Villa Castillo o 20 February 2019 Pages: 156 - 165
Ladenbergia siranensis (Rubiaceae: Cinchoneae), a new species from the Sira Mountains, Eastern Andes of Central Peru, and the identity of Ladenbergia acutifolia Eder A. Chilquillo TorresAndré Olmos SimõesJoaquina Albán Castillo OriginalPaper 16 January 2019 Pages: 166 - 171
Re-circumscription of Werneria cochlearis (Compositae): Nomenclature, taxonomic notes, and new synonyms Joel CalvoAndrés Moreira-Muñoz OriginalPaper 01 March 2019 Pages: 172 - 176
Drymonia croatii (Gesneriaceae), a new species from the Pacific slopes of the Colombian Andes Laura ClavijoAlejandro ZuluagaJohn L. Clark OriginalPaper 08 January 2019 Pages: 177 - 182
A new species of Adenocalymma (Bignonieae, Bignoniaceae) from Minas Gerais, Brazil Luiz Henrique M. FonsecaLúcia G. Lohmann OriginalPaper 08 November 2018 Pages: 183 - 189
Ipomoea vespertilia (Convolvulaceae), a new species revealed by pollinator observation Francisco Diego Sousa SantosGeadelande Carolino Delgado JuniorMaria Teresa Buril OriginalPaper 31 January 2019 Pages: 190 - 195
Conchocarpus jirajaranus (Rutaceae), a new endemic species of the Coastal Cordillera of Venezuela Jacquelyn A. KallunkiWinfried Meier OriginalPaper 28 February 2019 Pages: 196 - 200
Ten new species of Dacryodes from Amazonia and the Guianas. Studies in neotropical Burseraceae XXIII Douglas C. DalyMaría Cristina Martinez-Habibe OriginalPaper 20 February 2019 Pages: 201 - 224
