Thirteen new species and two new combinations of Stevia (Asteraceae: Eupatorieae) from Mexico Akiko SoejimaTetsukazu YaharaKuniaki Watanabe Articles Pages: 377 - 395
Notes on some South American species of Psychotria subgenus Heteropsychotria (Rubiaceae), with observations on rubiaceous taxonomic characters Piero G. Delprete Articles Pages: 396 - 404
Six new species ofAcourtia (Asteraceae) and a historical account ofAcourtia mexicana Leticia Cabrera R. Articles Pages: 416 - 429
A new species of Chiliotrichiopsis (Asteraceae: Astereae) from Peru Guy L. NesomHarold RobinsonArturo Granda Paucar Articles Pages: 430 - 434
Estimates of the number of mounted pteridophyte specimens in six major herbaria in the United States Robbin C. Moran Articles Pages: 435 - 436
Two new species and two new combinations in Mesoamerican Ericaceae James L. Luteyn Articles Pages: 437 - 446
Chloroplast DNA variation of Panax (Araliaceae) in Nepal and its taxonomic implications Ki-oug YooKuber J. MallaJun Wen Articles Pages: 447 - 453
A synopsis of theMaxillaria rufescens complex in Mexico, Central America, and the Greater Antilles Germán Carnevali Fernández-ConchaJosé Luis Tapia MuñozMauro Gómez-Juárez Articles Pages: 454 - 465
A systematic histological study of palm fruits. IV. Subtribe Oncospermatinae (Arecaceae) Frederick B. EssigLisa BussardNicole Hernandez Articles Pages: 466 - 471