Novon is a quarterly, peer-reviewed journal and publishes short articles whose primary purpose is the establishment of nomenclature in vascular plants and bryophytes.

CONTENTS OF NOVON 13(2)

Chromosome Cytology and Taxonomy of the Red Goblet-Flowered Species of Clidemia (Melastomataceae: Miconieae) in Central and South America. Frank Almeda

Arabidopsis bactriana Belongs to Dielsiocharis (Brassicaceae). Ihsan A. Al-Shehbaz and Sabir J. Junussov

Drabopsis Is United with Draba (Brassicaceae). Ihsan A. Al-Shehbaz and Marcus Koch

Three New Species of Biophytum (Oxalidaceae) from the Venezuelan Guayana. Gerardo Aymard C. and Paul E. Berry

Hippeophyllum microphyllum, a New Species of Orchidaceae from Papua New Guinea. Singchi Chen

A New Combination in Psilanthus (Rubiaceae) for Australasia, and Nomenclatural Notes on Paracoffea. Aaron P. Davis

Two New Species of Streptocarpus (Gesneriaceae) from South Africa. T. J. Edwards

Two New Species of Rhododendron (Ericaceae) from China. Gao Lian-ming and Li De-zhu

Primula calyptrata, a New Species in Section Carolinella (Primulaceae) from Yunnan, China. Gong Xun and Fang Rhui-cheng

Two New Species of Primula (Primulaceae) from China. Hu Chi Ming and Geng Yu Ying

A New Subspecies of Hippophae (Elaeagnaceae) from China. Lian Yongshan, Chen Xuelin, Sun Kun, and Ma Ruijun

A New Species of Cymbidium (Orchidaceae) from Tibet (Xizang), China. Chunlin Long, Zhiling Dao, and Heng Li

A New Species of Posoqueria (Rubiaceae) from Bahia, Brazil. Leila Macias and Luiza Sumiko Kinoshita

A New Species of Tillandsia (Bromeliaceae) from the Mexican Yucatán Peninsula. Ivón M. Ramírez M. and German Carnevali F.C.

New Status and Combinations for Japanese Taxa of Chionographis (Melanthiaceae). Noriyuki Tanaka

Rubiacearum Americanarum Magna Hama Pars XII. A New Species of Ixora (Ixoreae) from Panama. Charlotte M. Taylor

Rubiacearum Americanarum Magna Hama Pars XIII. A New Species of Schradera (Schradereae) from Mesoamerica. Charlotte M. Taylor

Rubiacearum Americanarum Magna Hama Pars XIV. New Species of Malanea (Guettardeae) from Western South America. Charlotte M. Taylor

Rubiacearum Americanarum Magna Hama Pars XV. New Species and Two New Combinations in Notopleura (Psychotrieae) from Central and South America. Charlotte M. Taylor

Quercus nixoniana (Fagaceae), una Nueva Especie de la Sección Lobatae, de la Sierra Madre del Sur, México. Susana Valencia Avalos and Lucio Lozada Pérez

Nomenclatural Notes on Sisymbrium (Brassicaceae). Suzanne I. Warwick and Ihsan A. Al-Shehbaz

A New Subspecies of Arceuthobium tsugense (Viscaceae) from British Columbia and Washington. Ed F. Wass and Robert L. Mathiasen

A New Species of the Genus Tulipa (Liliaceae) from China. Yi-Zhi Zhao