The Annals of the Missouri Botanical Garden, published quarterly since 1914, contains peer-reviewed papers primarily devoted to systematic botany and evolution. The Annals reflect the global mission of the Garden, with contributing authors from the Americas, Africa, Europe, Asia, and Australasia.

CONTENTS OF THE ANNALS OF THE MISSOURI BOTANICAL GARDEN, VOL. 96, NUMBER 4

A Revision of the Malagasy Endemic Helmiopsis (Malvaceae s.l.). Wendy L. Applequist

A Revision of Neotropical Bonyunia (Loganiaceae: Antonieae). Jason R. Grant

Phylogenetic Position and Taxonomic Classification of Aethionema trinervium (Brassicaceae): A Morphologically Variable Subshrub from Southwestern Asia. Ahmad Reza Khosravi, Fernand Jacquemoud, Sasan Mohsenzadeh, Marck Menke & Klaus Mummenhoff

A Systematic Revision of Gaertnera (Rubiaceae, Gaertnereae). Simon T. Malcomber & Charlotte M. Taylor

Cryptic Dioecy in Nyssa yunnanensis (Nyssaceae), a Critically Endangered Species from Tropical Eastern Asia. Bao-Ling Sun, Chang-Qin Zhang, Porter P. Lowry II & Jun Wen

Systematics of the South American Hypochaeris sessiliflora Complex (Asteraceae, Cichorieae). Estrella Urtubey, Tod F. Steussy & Karin Tremetsberger