Table 2.

Contents of monomers and dimers in rhizomes of Japanese, Bohemian and giant knotweed, expressed per dry mass (DM) of the plant material and quantified based on the (−)-epicatechin and procyanidin B2 calibration curves, respectively.

Knotweed	Contents of Monomers		Contents of Dimers		Contents of Monomers and Dimers
	mg/100 g DM	kg/t DM	mg/100 g DM	kg/t DM	mg/100 g DM	kg/t DM
Japanese	299	2.99	281	2.81	580	5.80
Bohemian	152	1.52	109	1.09	261	2.61
Giant	236	2.36	217	2.17	453	4.53