Fig. 30From: The adjustment of China endemic Heptacodium miconioides Rehd. to temperate zone of PolandXylem vessel structure on longitudinal tangential section of the 5 years old stem in Heptacodium myconioides (a, b). Designations: bp – bordered pitted walls of vessel; re – reticulate thickening of vessel; se – secretions in pith ray parenchyma; sp – the large pits resemble perforations. Scale bars 50 µmBack to article page