Pollen differences between Stylisma and Bonamia (Convolvulaceae) Walter H. Lewis OriginalPaper Pages: 331 - 334
Chromosome numbers of some new world species of Thelypteris Alan R. Smith OriginalPaper Pages: 354 - 360
Taxonomy and distribution of Clematis, sect. Atragene (Ranunculaceae), in North America James S. Pringle OriginalPaper Pages: 361 - 393
Studies of Pacific Island Plants, XXIV. The genus Terminalia (Combretaceae) in Fiji, Samoa, and Tonga Albert C. Smith OriginalPaper Pages: 394 - 412
Geographic variation in a widespread neotropical species, Mouriri myrtilloides (Melastomataceae) Thomas Morley OriginalPaper Pages: 413 - 424
Genetic affinities of the North American species of Hibiscus sect. Trionum Dwayne A. WiseMargaret Y. Menzel OriginalPaper Pages: 425 - 437