| A global agenda for advancing freshwater biodiversity research A Maasri, SC Jähnig, MC Adamescu, R Adrian, C Baigun, DJ Baird, ... Ecology Letters 25 (2), 255-263, 2022 | 122 | 2022 |
| Twenty‐five essential research questions to inform the protection and restoration of freshwater biodiversity M Harper, HS Mejbel, D Longert, R Abell, TD Beard, JR Bennett, ... Aquatic Conservation: Marine and Freshwater Ecosystems 31 (9), 2632-2653, 2021 | 60 | 2021 |
| Water-starworts (Callitriche) of Europe RV Lansdown, FJ Rumsey, PH Oswald | 57 | 2008 |
| European red list of lycopods and ferns MG Criado, H Väre, A Nieto, RB Elias, R Dyer, Y Ivanenko, D Ivanova, ... IUCN 59, 2017 | 49 | 2017 |
| Notes on the water-starworts (Callitriche) recorded in Europe RV Lansdown Watsonia 26 (2), 105-120, 2006 | 35 | 2006 |
| Arnica montana A Falniowski, I Bazos, I Hodálová, R Lansdown, A Petrova The IUCN Red List of Threatened Species 2011, 2011-1, 2011 | 32 | 2011 |
| The genus Callitriche (Callitrichaceae) in Asia RV Lansdown Novon: A Journal for Botanical Nomenclature 16 (3), 354-361, 2006 | 22 | 2006 |
| Review of alien freshwater vascular plants in South-east Europe RV Lansdown, P Anastasiu, Z Barina, I Bazos, H Çakan, D Caković, ... ESENIAS Scientific Reports 1, 137-154, 2016 | 19 | 2016 |
| The identity of Ranunculus subgenus Batrachium in the River Itchen RV Lansdown, FJ Rumsey Ardeola Environmental Services, 2007 | 19 | 2007 |
| Ecology of the Floating Water-plantain Luronium Natans RV LANSDOWN, PM WADE English Nature, 2003 | 17 | 2003 |
| The first confirmed population of the globally endangered Pilularia minuta (Marsileaceae) in Sicily A Troia, R Lansdown Webbia 71 (2), 283-286, 2016 | 16 | 2016 |
| Phragmites australis RV Lansdown, FN Diop The IUCN Red List of Threatened Species. e. T164494A79857020, 2015 | 15 | 2015 |
| Alarming decline of freshwater trigger species in western Mediterranean key biodiversity areas JG Nogueira, R Sousa, H Benaissa, G De Knijf, S Ferreira, M Ghamizi, ... Conservation Biology 35 (5), 1367-1379, 2021 | 14 | 2021 |
| An inventory of the vascular plants and bryophytes of Gavdopoula island (S Aegean, Greece) and its phytogeographical significance E Bergmeier, T Blockeel, N Böhling, C Fournaraki, P Gotsiou, R Jahn, ... Willdenowia 41 (1), 179-190, 2011 | 14 | 2011 |
| Bacopa monnieri RV Lansdown, SG Knees, A Patzelt Version 2014.2, 2013 | 13 | 2013 |
| Isoetes cangae RV Lansdown The IUCN Red List of Threatened Species 10, 2019 | 12 | 2019 |
| New distribution and taxonomic information on Callitriche (Plantaginaceae) in the Mediterranean region. RV Lansdown, I Bazos, MC Caria, A Troia, JJ Wieringa Phytotaxa 313 (1), 91-104, 2017 | 12 | 2017 |
| field guide to the riverine plants of Britain and Northern Ireland RV Lansdown | 12 | 2009 |
| Linnaean names in Callitriche L. (Callitrichaceae) and their typification R Lansdown, C Jarvis Taxon 53 (1), 169-172, 2004 | 12 | 2004 |
| Nomenclatural Notes on Callitriche (Callitrichaceae) in North America RV Lansdown Novon: A Journal for Botanical Nomenclature 19 (3), 364-369, 2009 | 11 | 2009 |
