Table 1

Number of retailers surveyed in 2016–2017 (N = 5) and in 2020 (N = 10) selling species included in the Belgian Consensus and Communication Lists and in the European List of Union Concern. The number of retailers where these species were present as stowaways are added between brackets.

Plant species Retailers 2016–2017 Retailers 2020 Belgian Code European Regulation
Azolla filiculoides 3 (3) 2 (6) Communication List
Cabomba caroliniana 1 (0) 1 (0) 3 August 2016
Crassula helmsii 1 (0) 2 (1) Consensus List
Cyperus eragrostis 4 (0) 9 (2) Consensus List
Egeria densa 5 (0) 5 (1) Consensus List
Eichhornia crassipes 5 (0) 0 (0) 3 August 2016
Erythranthe guttata 3 (0) 3 (1) Consensus List
Gunnera tinctoria 5 (0) 5 (0) 2 August 2017
Lagarosiphon major 1 (0) 0 (2) Consensus List 3 August 2016
Lemna minuta 0 (1) 0 (9) Communication List
Lysichiton americanus 3 (0) 0 (0) Communication List 3 August 2016
Salvinia molesta 4 (0) 2 (0) 15 August 2019

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