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Differences in the numbers of stamens and styles per flower are conspicuous features of variation in North American hawthoms… Expand Reintroductions are increasingly used to enhance declining populations, yet comparative data for critical germination and… Expand SummaryThe harvester antVeromessor andrei Mayr is a major seed predator on annual grassland growing on serpentine soil at Jasper… Expand We have isolated and characterized three adjacent Saccharomyces douglasii genes that share remarkable structural homology (97… Expand Many oak species are interfertile, and morphological and genetic evidence for hybridization is widespread. Here we use DNA… Expand Recent studies have found moderate to high levels of selfing in plants despite high inbreeding depression. Because both factors… Expand Habitat fragmentation can markedly influence the levels of pollen deposition and seed production in natural populations, and rare… Expand Variable spatial and temporal environments are known to affect the population dynamics of plants, but studies of local scale… Expand Crataegus crus-galli L. sensu lato in southern Ontario is a complex of taxa, two of which appear to consist exclusively of both… Expand AbSb8Ct Livestock impacts on riparian plant community composition, structure, and productivity were evaluated. After 3 years of… Expand