Table 4. Analysis of molecular variance among and within populations of S. purpurea and S. helvetica from three sampling locations.

Species	Source of variation	Sum of squares	Variance components	% variation
S. purpurea	Among populations	56.797	0.262	11.635
	Within populations	611.130	1.989	88.365
S. helvetica	Among populations	15.399	0.058	1.821
	Within populations	784.618	3.121	98.179