Reinstatement of the genus Hymenaea (Leguminosae: Caesalpinioideae) in Africa Jean H. LangenheimYin-Tse Lee OriginalPaper Pages: 3 - 21
A new Gustavia (Lecythidaceae) from Panama and Colombia Thomas B. CroatScott Mori OriginalPaper Pages: 22 - 26
A new species of Camptosema (Leguminosae: Lotoideae) from the Planalto of Brazil H. S. IrwinMary T. Kalin Arroyo OriginalPaper Pages: 27 - 29
New taxa in Pectis (Compositae: Pectidinae) from Mexico and the southwestern United States David J. Keil OriginalPaper Pages: 30 - 36
Relationships of the purple-fringed orchids Platanthera Psycodes and P. grandiflora Warren P. Stoutamire OriginalPaper Pages: 42 - 58
Chromosome numbers in Heterotheca, including Chrysopsis (Compositae: Astereae), with Phylogenetic interpretations Vernon L. Harms OriginalPaper Pages: 61 - 69
Monochaetum Talamancense (Melastomataceae): A new species endemic to Costa Rica Frank Almeda OriginalPaper Pages: 70 - 73
A morphological and chemical study of Populus acuminata Rydberg Daniel J. Crawford OriginalPaper Pages: 74 - 89
Two shrubby novelties in Eriogonum (Polygonaceae) from the deserts of Utah and Arizona James L. Reveal OriginalPaper Pages: 90 - 94