New Species and Combinations in Tropical American Polystichum (Dryopteridaceae). David S. Barrington, pages 365 through 373.

New or Noteworthy Orchids for the Venezuelan Flora. VII. Additions in Maxillaria from the Venezuelan Guayana. German Carnevali and Ivon Ramirez, pages 374 through 380.

Contribucion al Genero Mimosa (Mimosaceae). Renee H. Fortunato, pages 381 through 385.

A Revision of Mesoamerican Psychotria Subgenus Psychotria (Rubiaceae), Part II: Species 17-47. Clement W. Hamilton, pages 386 through 429.

New Species and Other Taxonomic Matters in the New World Memecyleae (Melastomataceae). Thomas Morley, pages 430 through 443.

Study of the Flora of Rucamanque, Cautin Province, Chile. Carlos Ramirez, Enrique Hauenstein, Jose San Martin, and Domingo Contreras, pages 444 through 453.

Novelties in the Orchid Flora of Southern Venezuela. Gustavo A. Romero and German Carnevali, pages 454 through 461.

Novelties in the Lauraceae from Venezuelan Guayana. Henk van der Werff, pages 462 through 475.

Taxonomic Studies in the Miconieae (Melastomataceae). III. Cladistic Analysis of Axillary-Flowered Taxa. Walter S. Judd, pages 476 through 495.

A Survey of Reproductive Biology in Neotropical Melastomataceae and Memecylaceae. Susanne S. Renner, pages 496 through 518.

Floral Nectaries in Melastomataceae and Their Systematic and Evolutionary Implications. Bruce A. Stein and Hiroshi Tobe, pages 519 through 531.

A Systematic Revision of Fuchsia Sect. Quelusia (Onagraceae). Paul E. Berry, pages 532 through 584.

Observations on Polyploidy in Fuchsia Sects. Quelusia and Kierschlegeria (Onagraceae). Takuji Hoshino and Paul E. Berry, pages 585 through 592.

Notes on the Cordia panamensis Complex (Boraginaceae) and a New Species from Colombia. James S. Miller, pages 593 through 595.

A New Aspidogyne (Orchidaceae) from Venezuelan Guayana. German Carnevali and Ernesto Foldats, pages 596 through 597.

Three New Species of Bomarea (Alstroemeriaceae) from Mesoamerica. Roy E. Gereau, pages 598 through 601.

Hosta yingeri (Liliaceae/Funkiaceae): A New Species from Korea. Samuel B. Jones, Jr., pages 602 through 604 .

Lindsaea mesarum, A New Fern Species from the Roraima Sandstone. K. U. Kramer, pages 605 through 607.

Two New Species of Passiflora Section Decaloba (Passifloraceae) from Costa Rica. John M. MacDougal, pages 608 through 614.

Passiflora mayarum, a New Species Related to P. prolata in Subgenus Passiflora (Passifloraceae). John M. MacDougal, pages 615 through 618.

Two New Species of Tournefortia (Boraginaceae) from Colombia. James S. Miller, pages 619 through 622.

A New Species of Urginea (Liliaceae) in Nigeria. S. O. Oyewole, pages 623 through 625.