Taxonomy of the Polygonum douglasii (Polygonaceae) complex with a new species from Oregon Mihai CosteaFrançois J. Tardif Taxonomy Pages: 1 - 27
Synonymy of Hortia arborea with H. brasiliana (Rutaceae) and a new species from Brazil Milton GroppoJacquelyn A. KallunkiJosé R. Pirani Taxonomy Pages: 28 - 34
A new species of Tzeltalia (Solanaceae) from Mexico Mahinda MartínezOfelia Vargas Taxonomy Pages: 35 - 38
A new species of Columnea and range extension in the Gesneriaceae from Costa Rica Ricardo Kriebel Taxonomy Pages: 39 - 42
A new species of Sicyos L. (Cucurbitaceae) from Oaxaca, Mexico Isela Rodríguez-ArévaloRafael LiraIsmael Calzada Taxonomy Pages: 43 - 46
A new species of Thrixspermum (Orchidaceae) from China Wen-Hong ChenYu-Min Shui Taxonomy Pages: 55 - 58
Wood and bark anatomy of Muntingiaceae: A phylogenetic comparison within Malvales s. l. Sherwin Carlquist Structural Botany Pages: 59 - 67
Specific epithets of the flowering plants of central French Guiana Edmund F. HecklauScott A. MoriJohn L. Brown Nomenclature Pages: 68 - 87
Chisacá, Un Recorrido por los Páramos Andinos. By Paola Pedraza-Peñalosa, Julio Betancur, and Pilar Franco-Rosselli Ma. Carmen Ulloa Ulloa Book Review Pages: 103 - 103