Summary — Northern red oak, Quercus rubra L, is a widely distributed forest-dominant tree in North America. In this paper, we present the results of 2 studies examining macrogeographic and finescale genetic structure in the North American oak species Quercus rubra L. The first study used allozymes as genetic markers to examine the distribution of genetic variation within and among 10

Summary — Many oak species show tremendous year-to-year variation in acorn production. Is Quercus alba / Q rubra / Q velutina / fructification massive / production de graines