Novon is a botanical journal whose purpose is to publish articles establishing new nomenclature, including new taxa and new names, for vascular plants and bryophytes.

CONTENTS OF NOVON, VOL. 33

Amaranthus pakai (Amaranthaceae), a New Critically Endangered Species from the Hawaiian Islands
Kevin Faccenda, Néstor David Bayón, Katherine Waselkov, and Robert W. Hobdy

Typification of Aristolochia saccata and Nomenclatural Notes for A. dilatata (Aristolochiaceae)
Tetsuo Ohi-Toma, Jin Murata, and Nobuyuki Tanaka

Una Nueva Especie de Hoffmannia (Rubiaceae) de México
Lucio Lozada-Pérez, Jesús Ricardo de Santiago Gómez, and Jorge Rojas Gutiérrez

Lithocarpus graniticus (Fagaceae), a New Species from the Granitic Mountain Valleys of Southern Fujian, China
Yi-Zhe Lin, Xin-Yan Chen, Liang Ma, Yi-Yao Zhu, and Shi-Pin Chen

A New Species of the Malagasy Genus Apodocephala (Compositae)
Joel Calvo and Martin W. Callmander

New Combinations in Dendrosenecio (Asteraceae)
Eric B. Knox

A New Species of Gonolobus (Apocynaceae, Asclepiadoideae) from Peru
W. D. Stevens and Alba L. Arbeláez

Taxonomic Novelties in Persicaria and Ruprechtia (Polygonaceae) from Veracruz, Mexico: Four New Species and a New Combination
Juan Javier Ortiz-Díaz and Juan José Ancona

Studies in Neotropical Araliaceae. XII. Taxonomic Revision of the Cotylanthes Group of Sciodaphyllum in Ecuador
M. Marcela Mora, Porter P. Lowry II, and Gregory M. Plunkett

Studies in Neotropical Araliaceae. XV. Sciodaphyllum neillii, a New Species from the Cordillera del Cóndor in Southeastern Ecuador, Honoring David A. Neill (1953–2025)
Porter P. Lowry II, Gregory M. Plunkett, M. Marcela Mora, and Peter H. Raven

Lycium ostrum, a New Species of Lycium (Solanaceae) from Qinghai, China
Dong Jing-zhou, Wang Jia-nan, and Wang Ying

Columnea flavohirsuta (Gesneriaceae), a New Species from the Chocó Biogeographic Region, and an Update on Some Columnea Circumscriptions
John L. Clark, Laura Clavijo, and Laurence E. Skog

Begonia nyishiorum (Begoniaceae), a New Species from Arunachal Pradesh, Northeast India
Ashish K. Soni, Akshath Shenoy, Abhinav Kumar, Misso Anu, Dipankar Borah, and Althaf Ahamed Kabeer

Schimperella subcompressa, a New Combination and an Earlier Name for S. bellointricata (Brachytheciaceae)
John J. Atwood and John C. Brinda

Lectotypification of Salvia sikkimensis and S. sikkimensis var. chaenocalyx (Lamiaceae)
Gianmarco Tavilla

Three New Species of Mimusops (Sapotaceae) from Madagascar
Laurent Gautier, Carlos G. Boluda, Yamama Naciri, and Richard Randrianaivo

Transfer of Four New Guinean Rhus Species to Toxicodendron (Anacardiaceae)
John D. Mitchell, Susan K. Pell, and Jun Wen

Bryomyces, a Genus Described from Foliar Moss Gemmae, Is an Earlier Name for Plenogemma (Orthotrichaceae)
John J. Atwood, William R. Buck, and Bernard Goffinet

A New Species of Dendropanax (Araliaceae) from the Pacific Slope of the Cordillera de Talamanca, Costa Rica
J. Francisco Morales and José Esteban Jiménez

A New and Noteworthy Species of Zanthoxylum (Rutaceae) from the Dry Forests of Peru
Carlos Reynel R.

Columnea congestiflora (Gesneriaceae), a New Species from the Western Andean Slopes of the Cordillera Occidental in Colombia
Carlos A. Solano-C, Nicolas Parra-Lizcano, John L. Clark, and James F. Smith

Passiflora dolorosa: A New Species of Passiflora supersect. Distephana (Passifloraceae) in Roraima, Brazil
Artur Manoel Leite Medeiros, Juliana de Paula-Souza, Vania Gonçalves-Esteves, Claudia Barbieri Ferreira Mendonça, and Ana Carolina Mezzonato-Pires

Rubiaceae Americanarum Magna Hama Pars LIII. New Species and a New Combination in Rudgea in Western and Central South America (Palicoureeae)
Charlotte M. Taylor

Two New Species of Lauraceae from Peru
Henk van der Werff

Three New Species of Impatiens (Balsaminaceae) from the Eastern Arc Mountains of Tanzania
Nora Gavin-Smyth, Andrea Bianchi, and Roy E. Gereau