Fig. 2From: Relationship between formation of earlywood vessels and leaf phenology in two ring-porous hardwoods, Quercus serrata and Robinia pseudoacacia, in early springLight micrographs showing the cambial zone, differentiating secondary xylem cells and enlarging vessel elements (asterisks) on 26th March. Enlarging vessel elements were observed at the top (a) and near the ground (b) in a stem of Q. serrata and at the top (c) and near the ground (d) in a stem of R. pseudoacacia. Bars 50 µm (a, b, d) and 25 µm (c)Back to article page