A morphometric study of the three species of Lepidium L. sect. Dileptium DC. is presented. Multivariate methods (cluster analysis and canonical discriminant analysis) were employed to investigate phenetic relations between examined individuals. As a result a set of quantitative characters useful in species determination was proposed and discussed.
The six-year cycle of monthly germination analyses of Capsella bursa-pastoris seeds were carried out. After the harvest the seeds germinate from ten to twenty percent, but from January their germination capacity increases to over 60%. Diaspores stored in the conditions of unheated room keep their viability from 4 to 5 years but their germination capacity is only 20%.