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. 80, NUMBER 1

Monograph of the Neotropical Species of Asplenium Sect. Hymenasplenium (Aspleniaceae). Noriaki Murakami & Robbin C. Moran

A Revision of the Genus Pleurothyrium (Lauraceae). Henk van der Werff

A Revision of Panicum Subg. Dichanthelium Sect. Dichanthelium (Poaceae: Panicoideae: Paniceae) in Mesoamerica, the West Indies, and South America. Fernando O. Zuloaga, Roger P. Ellis, and Osvaldo Morrone

A Revision of Monnina Subg. Pterocarya (Polygalaceae) in Northwestern South America. Bente Eriksen

The Misconstrued and Rare Species of Commelina (Commelinaceae) in the Eastern United States. Robert B. Faden

Tradescantia crassifolia (Commelinaceae), an Overlooked Species in the Southwestern United States. Robert B. Faden

El Genero Inga (Leguminosae: Mimosoideae) del Sur de Mexico y Centroamerica, Estudio Previo para la Flora Mesoamericana. Mario Sousa S.

Revision del Genero Styphnolobium (Leguminosae: Papilionoideae: Sophoreae). Mario Sousa S. and Velva E. Rudd

Diferencias Cromosomicas entre Algunas Especies de Los Generos Sophora L. y Styphnolobium Schott. Guadalupe Palomino, Patricia Martinez, Carmen Bernal, and Mario Sousa S.