Open Access Articles

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• The Evolutionary Legacy of Al Gentry: Uniting Patterns and Processes of Neotropical Rainforest Evolution

  Serafin J. R. Streiff, Roy H. J. Erkens, Thomas L. P. Couvreur

  200 - 216
• The Andes of Colombia and Ecuador as a Barrier to Fern and Lycophyte Species from Mesoamerica

  Sarah K. Morris, Robbin C. Moran

  88 - 110
• On the Fractal Dimension of Ecotones Among African Vascular Plants

  Thinabakho R. L. Ncube, Jon C. Lovett, Helen M. de Klerk, Cang Hui

  138 - 150
• In Memoriam: Chris Davidson (1944–2022), the Idaho Botanist Who Botanized the World

  Charlotte M. Taylor, Roy E. Gereau, W. D. Stevens, Sven Buerki, Olga Martha Montiel, Sharon Christoph

  479 - 491
• Areas of Endemism of Plants in the South-Central and Southwestern Nearctic Region

  Anna Saghatelyan, Tania Escalante

  51 - 72
• Taxonomic Studies of Diospyros (Ebenaceae) from the Malagasy Region. VII. Revision of Diospyros sect. Forbesia in Madagascar and the Comoro Islands

  Alexander G. Linan, Porter P. Lowry II, George E. Schatz

  72 - 110
• A Brief Early History of Plant Science in St. Louis and the Partnership between Washington University and the Missouri Botanical Garden

  Ralph S. Quatrano, Audrey S. Metcalf

  64 - 71
• A Multilocus Phylogeny of Daphniphyllum (Daphniphyllaceae)

  Mo-Shih Tang, Chi-Chu Tsai†, Yuen-Po Yang, Chiou-Rong Sheue, Shih-Hui Liu

  137 - 152
• The Central Role of Taxonomy in the Study of Neotropical Biodiversity

  Laura P. Lagomarsino, Laura A. Frost

  405 - 421
• Natural Enemies and the Maintenance of Tropical Tree Diversity: Recent Insights and Implications for the Future of Biodiversity in a Changing World

  Liza S. Comita, Simon M. Stump

  377 - 392
• New and Repeating Tipping Points: The Interplay of Fire, Climate Change, and Deforestation in Neotropical Ecosystems

  Mark B. Bush

  393 - 404
• Born in the Mediterranean: Comprehensive Taxonomic Revision of Biscutella ser. Biscutella (Brassicaceae) Based on Morphological and Phylogenetic Data

  Alicia Vicente, Mª Ángeles Alonso, Manuel B. Crespo

  195 - 231
• In Memoriam: James L. Zarucchi (1952–2019)

  Carmen Ulloa Ulloa, Tammy Charron, Jennifer Kuhl

  512 - 514
• The Claytonia arctica Complex in Alaska—Analyzing a Beringian Taxonomic Puzzle Using Taxonomic Concepts

  Stefanie M. Ickert-Bond, David Murray, Margaret G. Oliver, Hazel K. Berrios, Campbell O. Webb

  478 - 494
• Disentangling Reticulate Evolution of North Temperate Haplostemonous Ludwigia (Onagraceae)

  Shih-Hui Liu, Hsun-An Yang, Yoshiko Kono, Peter C. Hoch, Janet C. Barber, Ching-I Peng†, Kuo-Fang Chung

  163 - 182
• Hawkmoth Pollination Facilitates Long-distance Pollen Dispersal and Reduces Isolation Across a Gradient of Land-use Change

  Krissa A. Skogen, Rick P. Overson, Evan T. Hilpman, Jeremie B. Fant

  495 - 511
• A Monograph of Operculina (Convolvulaceae)

  G. W. Staples, Ana Rita Simões, Daniel F. Austin†

  64 - 138
• Genomic Identity of White Oak Species in an Eastern North American Syngameon

  Andrew L. Hipp, Alan T. Whittemore, Mira Garner, Marlene Hahn, Elisabeth Fitzek, Erwan Guichoux, Jeannine Cavender-Bares, Paul F. Gugger, Paul S. Manos, Ian S. Pearse, Charles H. Cannon

  455 - 477
• The Limits to Adaptation in Restored Ecosystems and How Management Can Help Overcome Them

  Jennifer A. Lau, Susan M. Magnoli, Chad R. Zirbel, Lars A. Brudvig

  441 - 454
• Fine-scale to Flora-wide Phylogenetic Perspectives on Californian Plant Diversity, Endemism, and Conservation

  Bruce G. Baldwin

  429 - 440
• Taxonomic Revision of Kaunia (Eupatorieae, Asteraceae), an Andean Genus with Presence in Eastern South America

  Jessica N. Viera Barreto, Gisela Sancho

  664 - 703
• A Synopsis of the Genus Stipa (Poaceae) in Middle Asia, Including a Key to Species Identification, an Annotated Checklist, and Phytogeographic Analyses

  Marcin Nobis, Polina D. Gudkova, Arkadiusz Nowak, Jakub Sawicki, Agnieszka Nobis

  1 - 63
• Revision and Morphological Phylogeny of Ephedranthus, a Neotropical Genus of Annonaceae

  Jenifer de Carvalho Lopes, Renato Mello-Silva

  244 - 261
• Strengthening the Link between International Conservation Policy and Plant Conservation Genetics to Achieve More Effective Plant Conservation

  Christine E. Edwards

  397-407
• Implementing Access and Benefit Sharing for Seed Banking

  Lucy A. Sutherland, Mark L. Shepheard

  386-396