The Evolution of Autogamy in Species of the Mustard Genus Leavenworthia (pp. 265-281) AND The Evolutionary Effects of Metalliferous and Other Anomalous Soils in South Central Africa (pp. 282-293) AND An Example of Sporangial Indehiscence in the Filicopsida (pp. 294-301) AND Enzyme Variation in Semi-Isolated Populations of the Mountain Fly Chamaemyia herbarum (pp. 302-312). (FROM: Evolution, Vol. 31, No. 2, June 1977).