Disjunction in Plants: A Symposium. Otto T. Solbrig

Morphology and Phytogeography: The Classical Approach to the Study of Disjunction. Carroll E. Wood, Jr.

Approaches to Disjunct Populationa: The Contribution to Palynology. Donald R. Whitehead

Genetical Features of Ferns as Contrasted to Seed Plants. Edward J. Klekowski, Jr.

Chemosystematic Data: Their Use in the Study of Disjunctions. B. L. Turner

Disjunctive Distributions in the Lichen-Forming Fungi. William Louis Culberson

Disjunctions in Bryophytes. W. B. Schofield & H. A. Crum

Disjunctions in Homosporous Vascular Plants. W. H. Wagner, Jr.

The Floristic Disjunctions between the "Monte" in Argentina and the "Sonoran Desert" in Mexico and the United States. Otto T. Solbrig

Species Disjunctions in Larrea: Evidence from Morphology, Cytogenetics, Phenolic Compounds, and Seed Albumins. J. H. Hunziker, R. A. Palacios, Amalia G. de Valesi & Lidia Poggio

Plant Species Disjunctions: A Summary. Peter H. Raven

Notes on Panamanian Trees and Shrubs Collected in 1971 by L. R. Holdridge and Others. John D. Dwyer

Solanaceae II: Typification of Subdivisions of Solanum. W. G. D`Arcy

New Taxa and Recombinations in Lopezia (Onagraceae). Uzi Plitmann, Peter H. Raven & D. e. Breedlove

The Comparative Morphology of the Cochlospermaceae. III. The Flower and Pollen. Richard C. Keating

New World Juglandaceae, III. A New Perspective of the Tropical Members with Winged Fruits. Donald E. Stone