Comparative analysis of biomorphological characteristics on the invasive Galega orientalis Lam. and cultivated G . officinalis L

The comparative analysis of micromorphological features (a flower morphogenesis, the sizes of pollen grains, structure of stoma) for two species of Galega L. is carried out. Data on other characteristics studied earlier [2] are generalized too. The obvious morphological features promoting naturalization of G.orientalis aren't revealed. However secondary distribution range much more bigger for G. orientalis than for G. officinalis. Therefore we consider that Propagule Pressure Hypothesis is most acceptable for an explanation the naturalization of G. orientalis.