The biogeography, ecology, and taxonomy of Lophophora (Cactaceae) Edward F. Anderson OriginalPaper Pages: 299 - 310
A new species of Proboscidea (Martyniaceae) from Mexico Richard H. Hevly OriginalPaper Pages: 311 - 313
Re-establishment of the genus Unxia (Compositae-Heliantheae) Tod F. Stuessy OriginalPaper Pages: 314 - 321
A revision of the Puerto Rican species of lepanthes (Orchidaceae) William R. Stimson OriginalPaper Pages: 332 - 345
Neotropical nymphoides (Menyanthaceae): Meso-American and west indian species Robert Oenduff OriginalPaper Pages: 346 - 352
A new species of coreopsis (Compositae) from Mexico Daniel J. Crawford OriginalPaper Pages: 353 - 354
A new Costa Rican species of centropogon (Campanulaceae-Lobelioideae) Robert L. Wilbur OriginalPaper Pages: 355 - 358
