The morphology and variability of amorpha (Amorpha fruticosa L.) seedlings have not been sufficiently studied. Qualitative and quantitative characteristics of seeds and seedlings have been studied only at the level of the species, i.e. based on typology (ANIĆ, 1983, REGENT, 1980, VASILJČENKO, 1960, etc.). This paper is the first report on the morphology and variability of several seedling properties based on a comparative analysis of 12 half-sib lines originating from three different sites of Ada Ciganlija: Salicetum albae s.L, Populetum nigrae s.l., Populetum albae s.l. In addition to biométrie data, we present approximate data on intra-line and inter-line polymorphism (monocotyledonous, polycotyledonous, variability of the number of simple leaflets, chlorophyll mutations, etc.). Amorpha seedlings are characterised by a well developed root system, which together with its fast growth in height and diameter explains the ability of amorpha to invade numerous, but only flooded forest sites or corresponding communities. The biométrie data presented in Tables 1 and 2 can be significant for the control of amorpha in our country.