Figure 5From: Degradation of sexual reproduction in Veronica filiformisafter introduction to EuropeSeed variation between seeds collected in the native area and those produced from German plants of V . filiformis . A. Seed size (width). B. Seed viability test. C. Seed germination test. Significance level: * = P ≤ 0.05, ** = P ≤ 0.01 and *** = P ≤ 0.001; 1 graduation = 0.12 mm.Back to article page