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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