this botanical engraving illustrates the internal cellular structure of a one-year-old twig of the blackcurrant (ribes nigrum) - cambium stock illustrationsThis botanical engraving illustrates the internal cellular structure of a one-year-old twig of the Blackcurrant (Ribes nigrum)
maple tree (acer) trunk cross sections showing medullary ray cells - 19th century - cambium stock illustrationsMaple Tree (Acer) Trunk Cross Sections Showing Medullary Ray Cells - 19th Century
