The Annals of the Missouri Botanical Garden, published quarterly since 1914, contains peer-reviewed papers primarily devoted to systematic botany and evolutionary biology. 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. 103, NUMBER 3

Geography of Plants in the New World: Humboldt’s Relevance in the Age of Big Data
Naia Morueta-Holme and Jens-Christian Svenning

Reassessment of Croton sect. Cleodora (Euphorbiaceae) Points to the Amazon Basin as Its Main Center of Diversity
Ricarda Riina, Paul E. Berry, Ricardo de S. Secco, Winfried Meier, and Maria Beatriz Rossi Caruzo

Taxonomic Revision of Trisetum sect. Trisetum (Poaceae: Pooideae: Aveninae) from Eurasia and North Africa
Patricia Barberá, Carlos Romero-Zarco, and Carlos Aedo

Evolution of Angiosperm Pollen. 6. The Celastrales, Oxalidales, and Malpighiales (COM) Clade and Zygophyllales
Zhi-Bin Tao, Alexandra H. Wortley, Lu Lu, De-Zhu Li, Hong Wang, and Stephen Blackmore

Vestured Pits in Wood of Onagraceae: Correlations with Ecology, Habit, and Phylogeny
Sherwin Carlquist and Peter H. Raven

• Editor-in-Chief: Li-Bing Zhang