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Information on measures and related costs in relation to species included on the Union list: Ambrosia confertiflora / Johannes Leonardus Cornelis Hendrikus van Valkenburg (2018) 

Public Citation Titre : Information on measures and related costs in relation to species included on the Union list: Ambrosia confertiflora : Technical note prepared by IUCN for the European Commission. Type de document : Électronique Auteurs : Johannes Leonardus Cornelis Hendrikus van Valkenburg (1964) Editeur : International Union for Conservation of Nature Année de publication : 2018 Importance : 15 p. Langues : Anglais (eng) Catégories : [CBNPMP-Thématique] Plantes subspontanées, naturalisées, envahissantes Mots-clés : Ambrosia confertiflora Permalink : https://biblio.cbnpmp.fr/index.php?lvl=notice_display&id=147691 Valkenburg, Johannes Leonardus Cornelis Hendrikus van (1964) , 2018. Information on measures and related costs in relation to species included on the Union list: Ambrosia confertiflora : Technical note prepared by IUCN for the European Commission. International Union for Conservation of Nature, [S.l.]. 15 pp.

Documents numériques

Consultable Note technique (2018) Adobe Acrobat PDF

Information on measures and related costs in relation to species included on the Union list: Andropogon virginicus / Johannes Leonardus Cornelis Hendrikus van Valkenburg (2018) 

Public Citation Titre : Information on measures and related costs in relation to species included on the Union list: Andropogon virginicus : Technical note prepared by IUCN for the European Commission. Type de document : Électronique Auteurs : Johannes Leonardus Cornelis Hendrikus van Valkenburg (1964) Editeur : International Union for Conservation of Nature Année de publication : 2018 Importance : 17 p. Langues : Anglais (eng) Catégories : [CBNPMP-Thématique] Plantes subspontanées, naturalisées, envahissantes Mots-clés : Andropogon virginicus Permalink : https://biblio.cbnpmp.fr/index.php?lvl=notice_display&id=147693 Valkenburg, Johannes Leonardus Cornelis Hendrikus van (1964) , 2018. Information on measures and related costs in relation to species included on the Union list: Andropogon virginicus : Technical note prepared by IUCN for the European Commission. International Union for Conservation of Nature, [S.l.]. 17 pp.

Documents numériques

Consultable Note technique (2018) Adobe Acrobat PDF

Information on measures and related costs in relation to species included on the Union list: Gymnocoronis spilanthoides / Johannes Leonardus Cornelis Hendrikus van Valkenburg (2017) 

Public Citation Titre : Information on measures and related costs in relation to species included on the Union list: Gymnocoronis spilanthoides : Technical note prepared by IUCN for the European Commission. Type de document : Électronique Auteurs : Johannes Leonardus Cornelis Hendrikus van Valkenburg (1964) Editeur : International Union for Conservation of Nature Année de publication : 2017 Importance : 12 p. Langues : Anglais (eng) Catégories : [CBNPMP-Thématique] Plantes subspontanées, naturalisées, envahissantes Mots-clés : Gymnocoronis spilanthoides Permalink : https://biblio.cbnpmp.fr/index.php?lvl=notice_display&id=147690 Valkenburg, Johannes Leonardus Cornelis Hendrikus van (1964) , 2017. Information on measures and related costs in relation to species included on the Union list: Gymnocoronis spilanthoides : Technical note prepared by IUCN for the European Commission. International Union for Conservation of Nature, [S.l.]. 12 pp.

Documents numériques

Consultable Note technique (2017) Adobe Acrobat PDF

Information on measures and related costs in relation to species included on the Union list: Hygrophila polysperma / Johannes Leonardus Cornelis Hendrikus van Valkenburg (2017) 

Public Citation Titre : Information on measures and related costs in relation to species included on the Union list: Hygrophila polysperma : Technical note prepared by IUCN for the European Commission. Type de document : Électronique Auteurs : Johannes Leonardus Cornelis Hendrikus van Valkenburg (1964) Editeur : International Union for Conservation of Nature Année de publication : 2017 Importance : 13 p. Langues : Anglais (eng) Catégories : [CBNPMP-Thématique] Plantes subspontanées, naturalisées, envahissantes Mots-clés : Hygrophila polysperma (Roxb.) T.Anderson Permalink : https://biblio.cbnpmp.fr/index.php?lvl=notice_display&id=147692 Valkenburg, Johannes Leonardus Cornelis Hendrikus van (1964) , 2017. Information on measures and related costs in relation to species included on the Union list: Hygrophila polysperma : Technical note prepared by IUCN for the European Commission. International Union for Conservation of Nature, [S.l.]. 13 pp.

Documents numériques

Consultable Note technique (2017) Adobe Acrobat PDF

Knowledge document for risk analysis of the non-native Curly Waterweed (Lagarosiphon major) in the Netherlands / J. Matthews (2012) 

Public Citation Titre : Knowledge document for risk analysis of the non-native Curly Waterweed (Lagarosiphon major) in the Netherlands Type de document : Électronique Auteurs : J. Matthews ; R. Beringen ; Frank P. L. Collas ; KR Koopman ; B. Odé ; R. Pot ; L. B. Sparrius ; Johannes Leonardus Cornelis Hendrikus van Valkenburg (1964) ; Laura N. H. Verbrugge ; Rob S. E. W. Leuven Editeur : Nijmegen : Department of Environmental Science Année de publication : 2012 Importance : 46 p. Langues : Anglais (eng) Catégories : [CBNPMP-Thématique] Plantes subspontanées, naturalisées, envahissantes Mots-clés : Lagarosiphon major (Ridl.) Moss, 1928 Permalink : https://biblio.cbnpmp.fr/index.php?lvl=notice_display&id=82836 Matthews, J., Beringen, R., Collas, Frank P. L., Koopman, KR, Odé, B., Pot, R., Sparrius, L. B., Valkenburg, Johannes Leonardus Cornelis Hendrikus van (1964), Verbrugge, Laura N. H., Leuven, Rob S. E. W. , 2012. Knowledge document for risk analysis of the non-native Curly Waterweed (Lagarosiphon major) in the Netherlands. Department of Environmental Science, Nijmegen. 46 pp.

Documents numériques

Consultable Rapport (2012) Adobe Acrobat PDF

Knowledge document for risk analysis of the non-native Monkeyflower (Mimulus guttatus) in the Netherlands / KR Koopman (2012) 

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Monographs on invasive plants in Europe N° 5: Ambrosia trifida L. / Bruno Chauvel in Botany letters, 168 (2) (2021)

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Myriophyllum rubricaule sp. nov., a M. aquaticum look-alike only known in cultivation / Johannes Leonardus Cornelis Hendrikus van Valkenburg in European Journal of Taxonomy, 828 (2022) 

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Naturalised Hakea. What species are we actually talking about in Europe? / Johannes Leonardus Cornelis Hendrikus van Valkenburg in Botany letters, 171 (3) (2024) 

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Nobanis - Invasive alien species fact sheet. Hydrocotyle ranunculoides / Andreas Hussner (2012) 

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Pennisetum setaceum or Pennisetum advena cultivars, what ornamental do we have in our garden / Johannes Leonardus Cornelis Hendrikus van Valkenburg in Ecology and evolution, 11 (2021) 

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A prioritization process for invasive alien plant species incorporating the requirements of EU Regulation no. 1143/2014 / Étienne Branquart in Bulletin OEPP, 46 (1) (2016) 

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Reproduction of Crassula helmsii by seed in western Europe / Bram D'hondt in Aquatic invasions, 11 (2) (2016) 

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Risk analysis of non-native Curly Waterweed (Lagarosiphon major) in the Netherlands / J. Matthews (2012) 

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Risk analysis of the non-native Monkeyflower (Mimulus guttatus) in the Netherlands / J. Matthews (2012) 

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