With the aim of specifying how A. graecorum adapts itself under different environmental conditions, 60 sites within three different habitats in Egypt were investigated. During one vegetation period, seeds, plant shoots and soil samples were analysed. The correlation between soil factors and morphological characteristics premises the expression of a phenotype-environment interaction or an ecomorphological pattern. Shoot cultures for plants grown under different habitats showed the same phenotype and isoenzyme patterns. Therefore, the variations recorded in plants grown under different habitats may be due to the influence of the ecological conditions. Organic compounds tended to accumulate within the shoots of A. graecorum grown under halic and xeric habitat conditions. This could play a role in the osmoregulation processes, which represent a part of the physiological response of individual plants under these conditions. The Na+ content of shoots from different habitats was not proportional to the Na+ content of the external soil solution. Also, the contents of CI- and S042- were lower than the contents of Na+, K+, Ca2+ and Mg 2+ within these shoots.This leads to the assumption that the plant has a special mechanism that prevents the accumulation of ions in the cells and/or controls their penetration.