TUDIES of plasmon variations in Epilobium (MICHAELIS 1954; CASPARI 1948), Oenothera ( STINSON 1960; STUBBE 1960), Streptocarpus ( OEHLKERS 1938; OEHLKERS and EBELL 1958), Solanum (KOOPMANS 1951,1952,1954,1955, 1959; BUCK 1960), Clarkia (HIORTH 1948), yeast (EPHRUSSI 1953), and Culex ( LAVEN 1959) have demonstrated that heritable plasmon variations exist and are of evolutionary importance. A fur...

We report on a revisit in 2009 to sites where vegetation was recorded in 1967 and 1970 on Disko Island, West Greenland. Re-sampling of the same clones of the grass Phleum alpinum after 39 years showed complete stability in biometrics but dramatic earlier onset of various phenological stages that were not related to changes in population density. In a fell-field community, there was a net specie...