Chromosome numbers of some North American Salix Yutaka SudaGeorge W. Argus OriginalPaper Pages: 191 - 197
Materials for a monograph of Freycinetia (Pandanaceae) III. Freycinetia corneri, a new species from Malaya Benjamin C. Stone OriginalPaper Pages: 198 - 202
Maranthes (Chrysobalanaceae), a new generic record for America Ghillean T. Prance OriginalPaper Pages: 203 - 204
Polyploidy in Ambrosia dumosa (Compositae: Ambrosieae) Peter H. RavenDonald W. KyhosWillard W. Payne OriginalPaper Pages: 205 - 211
Chromosome numbers and polyploidy in Castilleja (Scrophulariaceae) Lawrence R. Heckard OriginalPaper Pages: 212 - 226
A new species of Croton (Euphorbiaceae) widespread in Mexico Marshall C. Johnston OriginalPaper Pages: 227 - 229
A new species of Nemastylis (Iridaceae) from Mexico Elwood MolseedRobert W. Cruden OriginalPaper Pages: 235 - 237
Evidence for the hybrid origin of Flaveria latifolia (Compositae) Robert W. LongErnest L. Rhamstine OriginalPaper Pages: 238 - 250
A numerical taxonomic study of Cucurbita A. M. RhodesW. P. BemisS. G. Carmer OriginalPaper Pages: 251 - 266
