Contributions toward a monograph of cybianthus (Myrsinaceae): I. Subgenus iteoides and the identity of conomorpha loretensis John J. Pipoly OriginalPaper Pages: 493 - 497
Systematic studies in sedum section ternata (Crassulaceae) Patrick J. Calie OriginalPaper Pages: 498 - 507
New species of dalea section parosela (Leguminosae: Amorpheae) from Peru and Mexico Rupert C. Barneby OriginalPaper Pages: 508 - 511
Senna barnebyana (Leguminosae: Caesalpinioideae), a new “Cassia” from Peru Alex Lasseigne OriginalPaper Pages: 512 - 514
A remarkable heterophyllous disciphania (Menispermaceae) from Peru Rupert C. Barneby OriginalPaper Pages: 515 - 516
The phytogeography of leaf morphology in two species of North American Asters: Lasallea Novae-Angliae and L. Oblongifolia (Compositae) John C. SempleJoAnne Ford OriginalPaper Pages: 517 - 522
Senecio and erechtites (Compositae) in the North American Flora: Supplementary notes Theodore M. Barkley OriginalPaper Pages: 523 - 527
Lychnophora (Compositae: Vernonieae), a genus endemic to the Brazilian Planalto Nancy C. CoileSamuel B. Jones OriginalPaper Pages: 528 - 542
A New Combination in Vernonia (Compositae: Vernonieae) Samuel B. JonesNancy C. Coile OriginalPaper Pages: 543 - 543
Three New Species of Vernonia (Compositae: Vernonieae) from Mexico Samuel B. JonesJohn G. Stutts OriginalPaper Pages: 544 - 546
A new variety of coreopsis mutica (Compositae) from Mexico Daniel J. Crawford OriginalPaper Pages: 547 - 551
Dioon holmgrenii (Zamiaceae), a new species from Mexico Paolo De LucaSergio SabatoMario Vázquez Torres OriginalPaper Pages: 552 - 555
The taxonomy of eriodon and notes on other South American genera of brachytheciaceae with erect capsules William R. Buck OriginalPaper Pages: 556 - 563
Contributions to the morphology and anatomy of strasburgeria and a discussion of the taxonomic position of the strasburgeriaceae William C. Dickison OriginalPaper Pages: 564 - 580
A new catostemma (Bombacaceae) from Colombia John D. ShepherdWilliam S. Alverson OriginalPaper Pages: 587 - 590
Changes in the West Indian operculina (Convolvulaceae) George W. StaplesDaniel F. Austin OriginalPaper Pages: 591 - 596