De Boer et al. DNA metabarcoding of orchid-derived products reveals widespread illegal orchid trade. Proceedings of the Royal Society B. DOI: 10.1098/rspb.2017-1182. Electronic Supplementary Material (ESM) Table S4 J. de BoerHugo GhorbaniAbdolbaset ManzanillaVincent RaclariuAncuta-Cristina KreziouAnna OunjaiSarawut OsathanunkulMaslin GravendeelBarbara 2017 Plant species detected in more than 20 % of samples, excluding orchids (presence as % in total samples in parentheses).