Systematics of Nymphaea subgenus Hydrocallis (Nymphaeaceae). I. Four new species from the Neotropics John H. Wiersema OriginalPaper Pages: 213 - 222
Dion tomasellii (Zamiaceae), a new species with two varieties from western Mexico Paolo De LucaSergio SabatoMario Vázquez Torres OriginalPaper Pages: 223 - 227
Potentilla basaltica (Rosaceae), a new species from Nevada Arnold TiehmBarbara Ertter OriginalPaper Pages: 228 - 231
Studies on Middle American Begonia (Begoniaceae) I Kathleen Burt-Utley OriginalPaper Pages: 232 - 235
Two new mimosaceous trees from the American Tropics Rupert C. BarnebyJames W. Grimes OriginalPaper Pages: 236 - 240
A new name and new combinations in Campomanesia and Pimenta (Myrtaceae) Leslie R. Landrum BriefCommunication Pages: 241 - 243
A synoptic classification of living organisms. Edited by R. S. K. Barnes Arthur Cronquist Book Review Pages: 243 - 243
A new species of Simaba (Simaroubaceae) from Pará, Brazil, with a key to the species north of the Amazon River Wm. Wayt Thomas OriginalPaper Pages: 244 - 247
A new Bolivian Mimosa of section Habbasia series Leptostachyae (Leguminosae: Mimosoideae), close kin of the fictitious genus Schranckiastrum Rupert C. Barneby OriginalPaper Pages: 248 - 251
The diversity of green plants. Third Edition. By P. Bell and C. Woodcock Dennis Wm. Stevenson Book Review Pages: 251 - 251
Quararibea pumila (Bombacaceae), a new endemic from Costa Rica William S. Alverson OriginalPaper Pages: 252 - 256
The Orchidaceae of the Bahama Archipelago—Additions and range extensions Ruben P. SauledaRalph M. Adams OriginalPaper Pages: 257 - 261
New combinations for Panicum subgenus Panicum and subgenus Dichanthelium (Poaceae) of the Southeastern United States Michel G. Lelong OriginalPaper Pages: 262 - 273
Transfer of Coreopsis insularis (Compositae: Heliantheae) to Coreocarpus Edwin B. Smith OriginalPaper Pages: 274 - 275
New records of Peruvian Mikania (Compositae) Walter C. HolmesSidney McDaniel OriginalPaper Pages: 276 - 279
Chromosome numbers of goldenrods, Euthamia and Solidago (Compositae: Astereae). II. Additional counts with comments on cytogeography John C. SempleGordon S. RingiusGary Morton OriginalPaper Pages: 280 - 292
Fungi from the A. O. Garrett Herbarium, University of Utah (UT) Clark T. RogersonBarbara M. Thiers OriginalPaper Pages: 293 - 296
A new species of Salvia (Lamiaceae) from Mexico Thennilapuram P. Ramamoorthy OriginalPaper Pages: 297 - 299
The familial placement of Bryowijkia (Musci: Trachypodaceae) Dale H. VittWilliam R. Buck OriginalPaper Pages: 300 - 306
Variation and taxonomy of Betula uber, B. Lenta, and B. alleghaniensis Terry L. SharikRobert H. Ford OriginalPaper Pages: 307 - 316
Manipulus Rubiacearum III. Deppeeae, a new tribe of Rubioideae (Rubiaceae) Joseph H. Kirkbride OriginalPaper Pages: 317 - 320
Salix occidentalis Walter, the correct name for S. tristis Aiton (Salicaceae) George W. Argus OriginalPaper Pages: 328 - 329
New taxa of Malpighia (Malpighiaceae) from Mexico and the West Indies José Luis Vivaldi OriginalPaper Pages: 330 - 332
