The Annals is an international journal primarily devoted to systematic botany and evolutionary biology. We encourage submissions of original papers dealing with significant advances in the taxonomy, phylogeny, conservation, and evolution of plants using morphological and/or molecular characters.

CONTENTS OF THE ANNALS OF THE MISSOURI BOTANICAL GARDEN, VOL. 109

A Taxonomic Revision of the Mexican Genus Bakerantha (Hechtioideae, Bromeliaceae)
Katya J. Romero-Soler, Ivón M. Ramírez-Morillo, Claudia T. Hornung-Leoni, Manuel González Ledesma

Toward a Revision of the Genus Orthosia (Apocynaceae: Asclepiadoideae: Asclepiadeae)
Sigrid Liede-Schumann, Ulrich Meve

Untangling the Taxonomy of Rorida (Cleomaceae) in Iran
Mina Khorasani, Alireza Naqinezhad, Mansour Mirtadzadini

A Revision of Bidens (Asteraceae: Coreopsideae) from Bolivia
Mabel A. Lizarazu, Stephan G. Beck, Alfredo Fuentes, Susana E. Freire

Taxonomic Revision of the Petiolatum Clade of Elaphoglossum sect. Lepidoglossa (Dryopteridaceae)
Ana Gabriela Martínez-Becerril, Alejandra Vasco

Taxonomic Revision and Morphometric Analysis of Gamochaeta (Asteraceae, Gnaphalieae)
Susana E. Freire, Mariana A. Grossi, Néstor D. Bayón, Claudia Monti, Laura Iharlegui, María A. Migoya

A Taxonomic Account of Mucuna (Leguminosae–Papilionoideae) in Africa, Madagascar, and the Indian Ocean Islands, with Comments on Its Biogeographic History
Tania M. Moura, Roy E. Gereau, Domingos Cardoso, Gwilym P. Lewis

A Molecular Temporal Evolutionary Framework of Land Plants and the Age of Angiosperms
Yin-Long Qiu, Alexander B. Taylor, Isaac M. Fine

Taxonomic Revision of Senna ser. Spinescentes (Leguminosae, Cassieae), Including Two New South American Species
Alexandre Gibau de Lima, Marcelo Trovó, Roseli Lopes da Costa Bortoluzzi, Juliana Gastaldello Rando, Christine D. Bacon, Vidal de Freitas Mansano

Taxonomic Revision of Lippia in Paraguay
Fabiana Mirra, Pablo Moroni, Juana De Egea, Nataly O’Leary

Pierfelice Ravenna (1938–2022)—Life, New Names, and Confusion
Nicolás García, Peter H. Raven, Alan W. Meerow