Experimental studies on the nature of species

"Literature cited": v.1, p. 437-442; v.2, p. 154-163; v.3, p. 124-125; v.5, p. 198-204; v.6, p. 113-115.I. Effect of varied environments on western North American plants.--II. Plant evolution through amphiploidy and autoploidy, with examples from the Madiinae.--III. Environmental responses of climatic races of Achillea.--IV. Genetic structure of ecological races.--V. Biosystematics, genetics, and physiological ecology of the erythranthe section of mimulus.--VI. Interspecific hybrid derivatives between facultatively apomictic species of bluegrasses and their responses to contrasting environments.Mode of access: Internet