Vol. 31 (2023)

Articles

• Two New Species of the African Genus Discoclaoxylon (Claoxylinae: Euphorbiaceae) from Central Africa

  Patricia Barberá, Olivier Lachenaud, Alejandro Quintanar

  1 - 9

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• More New Species of Psychotria from Madagascar (Rubiaceae, Psychotrieae)

  Charlotte M. Taylor, Heidi H. Schmidt, Roy E. Gereau

  10 - 32

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• A New Combination for a Narrowly Endemic Polemonium (Polemoniaceae)

  Jeffrey P. Rose, Kenneth J. Sytsma

  33 - 35

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• Rubiacearum Americanarum Magna Hama Pars L: New Species, Combinations, and Notes for Some South American Genera of Dialypetalantheae (Former Condamineeae)

  Charlotte M. Taylor, Carla Maldonado

  36 - 70

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• Clematicissus pruinata, a New Combination in Vitaceae

  Adela María Panizza, Christian Alejandro Zanotti

  71 - 72

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• Taxonomic Studies on Malagasy Dalbergia (Fabaceae). IV. A New Species from Central and Southern Madagascar and a Narrowed Circumscription for D. emirnensis

  Nivohenintsoa Rakotonirina, Peter B. Phillipson, Simon Crameri, Nicholas Wilding, Porter P. Lowry II, Bakolimalala Rakouth, Richardson Razakamalala

  73 - 87

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• A New Species of Matelea (Apocynaceae, Asclepiadoideae) from the Península de Nicoya, Guanacaste, Costa Rica

  José Esteban Jiménez, Miguel Méndez, Alexis Obregón-Carrillo

  88 - 94

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• Salimenaea and Troncosoa (Verbenaceae, Lantaneae), Two New Monotypic Genera from Southern South America

  Nataly O'Leary, Pablo Moroni, Patricia Lu-Irving, Fabiana Mirra, Richard G. Olmstead

  95 - 107

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• A New Species of Werauhia (Bromeliaceae: Tillandsioideae) from Montane Cloud Forests of Costa Rica

  Alfredo Cascante-Marin, J. Francisco Morales

  108 - 113

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• A New Species of Zanthoxylum (Rutaceae) from Colombia and Brazil

  Carlos Reynel R., Yeison Londoño-Echeverri

  114 - 117

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• New Boraginales from Tropical America 10: New Species of Cordia from Colombia, Ecuador, and Peru

  James S. Miller, Colin Robinson, Victoria Patrick

  118 - 122

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• New Boraginales from Tropical America 11: A New Species of Cordia (Boraginales: Cordiaceae) from Colombia and Venezuela

  James S. Miller

  123 - 125

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• A New Species of Matelea (Apocynaceae, Gonolobinae) from Bolivia and an Assessment of Matelea in Bolivia

  Gilberto Morillo, Ulrich Meve, Sigrid Liede-Schumann

  126 - 131

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• Four New Species of Philodendron subg. Philodendron (Araceae) from Caquetá Department, Colombia

  Thomas B. Croat, Thomas E. Mines, Edwin Trujillo Trujillo

  132 - 138

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• Typifications and Nomenclatural Notes on Old World Names in Boehmeria (Urticaceae)

  K. K. Jeomol, P. Sunojkumar

  139 - 153

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• A New Varietal Combination for a Narrowly Endemic Rock Daisy (Laphamia: Asteraceae) in Southern New Mexico

  Zachary S. Rogers, Richard W. Spellenberg

  154 - 155

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• Taxonomic Studies of Diospyros (Ebenaceae) from the Malagasy Region. IX. Clarification of Species Limits Between D. clusiifolia and D. fuscovelutina, and Establishment of a New Combination Based on a Name Previously Placed in Synonymy, Tetraclis baronii

  Hasina N. Rakouth, Richard Randrianaivo, Sandratra A. F. Andrianarivelo, Dochard A. Karatra, Minosoa Z. Nombanjanahary, Stephano Andriamiadana, Roger L. Andriamiarisoa, Roger Bernard , Richardson Razakamalala, Sylvie Andriambololonera, Bakolimalala Rakouth, Porter P. Lowry II

  156 - 162

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• Five New Combinations in Passiflora sect. Dysosmia (Passifloraceae)

  Harlan T. Svoboda

  163 - 168

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• A New Polygonatum, P. bifolium species (Asparagaceae: Nolinoideae: Polygonateae) from Myanmar and a Checklist of the Species Known to Occur There

  Aaron Floden, Thet Yu Nwe, Kate E. Armstrong

  169 - 177

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• New Combinations and Lectotypifications in Rubiaceae for the Flora of Tropical East Africa

  Roy E. Gereau, W. R. Quentin Luke, Henk J. Beentje, Maria Alvarez

  178 - 180

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• Chlorophytum vespertinum (Asparagaceae, Anthericeae), a New Species from Zambia and Tanzania

  Roy E. Gereau, Shakkie Kativu, Pierre Meerts, Lari Merrett, Jo Osborne, Kaj Vollesen

  181 - 190

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• Elevation of Three Varieties of the Malagasy Endemic Casearia nigrescens (Salicaceae) to the Species Level

  Angelina X. Wang, Laurel Philpott, Wendy L. Applequist

  191 - 197

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• Two New Species of Persea (Lauraceae) from Ecuador

  Jens G. Rohwer, Henk van der Werff

  198 - 204

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