Vilotić, Dragica All rights reserved application/pdf 3143734 bytes If we examine the cross sections of the primary silver fir stem in different periods of time some changes in anatomical structure could be observed: 1. Silver fir tunica wraping up apical meristem like a veil is built up of 5 layers of prameristem cells. 2. In differentiation zone of the primary ten days old tree the cells are not differentiated. 3. In differentiation zone the cells have been differentiated and at the cross section of the primary twenty days old stem the folowing could be seen: epidermis, primary bark, central cylinder and heartwood while the cambium takes shape of a star. 4. On a stem 58 days of age the cambium is formed in the shape of ring. 5. The transfer from the pirimary to the secundary structure of the silver fir tree is gradual. srp Zbornik radova Instituta za šumarstvo startpage: 71 endpage: 78 https://unilib.phaidrabg.rs/o:7072 ISSN: 0351-9147 Institut za šumarstvo info:eu-repo/semantics/article 1989 ANATOMSKA GRAĐA STABLA JELE SA GOČA (ABIES ALBA MILL) OD KLICE DO POČETKA SEKUNDARNOG DEBLJANJA ANATOMICAL STRUCTURE OF STEM AND ROOT OF SILVER FIR (ABIES ALBA MILL.)