Remerciements
Jan De Langhe est particulièrement reconnaissant aux personnes suivantes (les abbréviations dans cette liste font référence aux abbréviations utilisées dans les noms des images):
Anthony Aiello, Folkert Aleva, Susyn Andrews, Clément Anthoine, Hugh Angus, Robin Ardito, James Armitage, Christelle Bacquet, Piotr Banaszczak, Bruce Bartholomew, Ben Baudts, Timothy Baxter, Richard Bellanger, Patrick Bellec (BELLEC), Clément Benoit, Dirk Benoit (PAVIA), Verena Berchtold, Dave Boufford, Charles Boulanger, Mona Bourell, Wolfgang Bopp, Jan Just Bos, Peter Brownless, Roman Businský, George Callen, Koen Camelbeke, Debbie Chubb, Tom Clark, Barry Clarke (BARCLA), Chris Clennett, Fran Clifton, Agustin Coello, Olivier Colin (OCOLIN), Allen Coombes, Christophe Crock, Dan Crowley, Helmut Dahlitz, Daniël De Belder, Diane De Belder, Robert De Belder, Michel Décalut, Antoon De Clercq (ADCN), Herlinde De Jaeck, Piet de Jong, Luc De Jonge (LDJ), Henk De Leeuw, Laurent De Lepeleere, Dirk De Meyere, Min Deng, Albert De Raedt (ADRA), Jean des Arbres, Philippe de Spoelberch, De Vrienden van de Plantentuin Gent, Eric Dewaele (EDWI), Malo Dormont, Catherine Ducatillion, Maurice Duhard, Raymond Durand, Peter Endress, Peter Enz, Hartmut Ern, Bruno Erny, Fiona Falcona, Aljos Farjon, Bernard Favier, Brigitte Fiebig, Richard Figlar, Mark Flanagan, Gert Fortgens, Maurice Foster (MFOST), Michael Frankis, Nicolas Freyre, Friederike Gallenmüller, Siegfried Gand, Martin Gardner, Francisco Garin, Stefan Giefer, Silvan Glauser, Paul Goetghebeur, Peter Gregory, John Grimshaw, François Hachette, Shaun Haddock (LABERG), Tom Hart Dyke, Larry Hatch, Michael Heathcoat Amory, Jean-Louis Hélardot, Didier Hermans (BUXHER), Vincent Herpailler, Hans Heybroek, Tony Hibbert, Elvira Hoerandl, Nigel Holman, Charles Howick, Tom Hudson, Stefanie Ickert-Bond, Eike Jablonski, Robert Jamieson, David Jewell, Owen Johnson, Douglas Justice, Alexandra Kehl, Tobias Kehrer, Lloyd Kenyon (KENYON), Tony Kirkham, Sabina Knees, Phillip Kodela, Henny Kolster, Jelena Kovačič – De Belder, Gregor Kozlowski, Horst Kraft, Anett Krämer, Matthias Krause, Rob Kruijt, Eric La Fountaine, Thierry Lamant, Neil Lancaster, Roy Lancaster (RLANC), Chris Lane (CLANEC), Christopher Lang, Herman Laporte, Isabel Larridon, Marianne Lauerer, Antoine le Hardÿ de Beaulieu, Raf Lenaerts (RAFLEN), Jie Li, Xi-wen Li, Marc Libert, Nick Lightfoot, Matt Lobdell, Cornelia Löhne, Pierre-Andre Loizeau, David Long, Dan Luscombe, Ben Lyte, James MacEwen, Christa Maes, Valéry Malécot, Rolf Marquardt, Andrew Marsh, Rosalyn Marshall, John Marston, Bruce Maslin, Michael Mauser, Hugh McAllister (HMCALL), Bob McCartney, Kevin McGinn, Jean Merret, Simon Momper, Peter Moore, David More, Jaime Morin, Daniel Murphy, Mike Nelhams, Henry Noltie, Mikinori Ogisu, Pamela Olshefski, Ralf Omlor, Joke Ossaer, Shaun Overstreet, Phill Parsons, Zofia Piecko, Ulrich Pietzarka, Donald Pigott, Mark Pitman, Jacky Pousse (POUSSE), István Rácz, Markus Radscheit, Abraham Rammeloo, Paul Reader, David Reid, Heribert Reif, Katja Rembold, Will Ritchie, Wolf-Achim Roland, Jens Rohwer, Nicolas Ruch, Keith Rushforth (KRUSH), Marie-Stéphanie Samain, Daniel Sanford, Deborah Schäfer, Marianne Schaller, Nico Schellevis, Peter A. Schmidt, Brian Schrire, Bernd Schulz, Jacques Sciboz, Charles Shine, Daan Smit, Doug Smith, Gijs Steur, Joeri Sergej Strijk, Wolfgang Stuppy, Michel Timacheff, Frédéric Tournay, Raymond Townsend, Louis et Michèle Tranchant, Philip Tregunna, Piers Trehane, Gemma Trier (GTS), Liesbeth Uijtewaal, Barry Unwin, Jan Van Bogaert, Filip Van den Bossche, Henk van der Werff, Kees en Lida van Gaal, Cor van Gelderen, Dick van Gelderen, James R.P. Van Hoey Smith, Jef Van Meulder (JVM), Kurt Van Nieuwenhuyse (KUVANI), Bruno Van Puijenbroek (BVPUIJ), Hans van Roon, Marian Vande Wiele, Vincent Vaxelaire, Patrick Vereecke, Jan Willem Vos, Freek Vrugtman, Eva Wallander, Neville Walsh, Laura Wester, Onno Wijnands, Charles Williams, Julian Williams, Robbert Willink, Johan Willm, Eric Windey (EW), George Witherwick, Bart Wursten, Bleddyn Wynn-Jones, Rolf Zumbrunn (RZM), Pieter Zwijnenburg Junior (PZJB).
Et aux institutions suivantes pour leur support et leur spécimens d'herbier depuis 1982 (les abbréviations dans cette liste font référence aux abbréviations utilisées dans les noms des images):
- Actinidia collection Christian De Kezel Sint-Amandsberg, B (CHDEKE)
- Aiken, USA (AIKEN)
- Antony House & Garden Torpoint, UK
- Arboretum Bokrijk Genk, B (ABG)
- Arboretum Belmonte Wageningen, NL (ABW)
- Arboretum Des Barres Nogent-sur-Vernisson, F (ADBNSV)
- Arboretum De Dreijen Wageningen, NL (ADDW)
- Arboretum de Versailles-Chèvreloup, F (ADCR)
- Arboretum Groenendaal Hoeilaart, B (AGH)
- Arboretum Het Leen, B (AHLE)
- Arboretum Hof ter Saksen, B(AHTSB)
- Arboretum Kalmthout, B (AKA)
- Arboretum Keracoual, F (KERAC)
- Arboretum Les Arbres du Monde, F (AMONDE)
- Arboretum Parc de la Riviere Bleue, NCL (RIBLEU)
- Arboretum Robert Lenoir, B (ARLR)
- Arboretum Rogow, PL (AROGOW)
- Arboretum Tervuren Brussel, B (ATB)
- Arboretum Trompenburg Rotterdam, NL (ATR)
- Arboretum Waasland, B (AWNW)
- Arboretum Wespelaar and Herkenrode, Haacht, B (HWH)
- Arley House (Castle Garden), Kidderminster, UK (ARLEYC)
- Arley House (Naboth's Vineyard), Kidderminster, UK (ARLEYN)
- Bedgebury National Pinetum, UK (BEDGEB)
- Belgian Dendrology Society
- Benmore Botanic Garden, UK (BENMBG)
- Bömer Boomkwekerij Zundert, NL (BBZ)
- Bonte Hoek Kwekerijen (Ulmus), NL (BHOEK)
- Boomkwekerijen Rutten Leende, NL (BRL)
- Botanischer Garten Albert-Ludwigs-Universität Freiburg, D (FREIBG)
- Botanischer Garten Berlin-Dahlem, D (BGBD)
- Botanischer Garten Dortmund, D (BGD)
- Botanischer Garten Johannes Gutenberg-Universität Mainz, D (MAINZ)
- Botanischer Garten Köln, D (BGK)
- Botanischer Garten Ruhr-Universität Bochum, D (BOCHUM)
- Botanischer Garten Technische Universität Dresden, D (DRESDN)
- Botanischer Garten der Universität Basel, CH (BGUBAS)
- Botanischer Garten der Universität Bern, CH (BGBERN)
- Botanische Gärten der Universität Bonn, D (BGBONN)
- Botanischer Gärten Universität Tübingen, D (BGUTUB)
- Botanischer Garten der Universität Zürich, CH (BGUZUR)
- Botanische Tuinen Universiteit Utrecht, NL (UTRUBG)
- Buddleja National Collection, Longstock Park Nursery, UK (BUDCOL)
- Burncoose Nursery Gwenap, UK (B&SDNG)
- Caerhays Castle Gardens, UK (CCG)
- Castle Howard Arboretum, Yorkshire Arboretum and Ray Wood, York, UK (HOWARD)
- Chevithorne Barton, UK (CHEVIT)
- Chocha, Michel Duhart Ustaritz, F (CHOCHA)
- Chyverton Zelah, UK (CZ)
- Colesbourne Park, UK (COLESB)
- Conservatoire et Jardin Botaniques de la ville de Genève, CH (GENEVA)
- County Park Nursery Hornchurch, UK (CPNH)
- Crataegus collection Kurt Van Nieuwenhuyse Tielt, B (KUVANI)
- Crûg Farm Plants, UK (CRÛG)
- Daphne collection, Herman Laporte, Ramsel, B (DAPHNE)
- Dawyck Botanic Garden, UK (DBG)
- Eastwoodhill Arboretum, NZ (EWHARB)
- Eucalyptus collection Fleet, UK (ECF)
- Euonymus collectie Henny Kolster, NL (HKOLST)
- La Fauconniere, Cherbourg, F (LFC)
- Firma C.Esveld Boskoop, NL (FCEB)
- Forstbotanische Garten Köln, D (FGK)
- Gammon, Birchfleet Nurseries, UK (GAMMON)
- Glendurgan Garden Mawnan Smith, UK (GGMS)
- Gorwell House Garden, UK (GORWHG)
- The Granary-Witch Hazel Nursery, Chris Lane collection (Amelanchier, Prunus), UK (CLANEC)
- Hackfalls Arboretum, NZ (HACKFS)
- Hemelrijk Essen, B (HE)
- Hillier Gardens and Arboretum, UK (HGAA)
- Hiroshima Botanical Garden, J (HIROBG)
- Hohenheimer Gärten, Universität Hohenheim, Institut für Botanik, D (HHHEIM)
- Hørsholm Arboretum, DK (HA)
- Hortus Botanicus Amsterdam Buitenveldert, NL (HBAB)
- Hortus Botanicus Leiden, NL (HBL)
- Howick Hall Gardens & Arboretum, UK (HOWICK)
- Hydrangea Collection Destelbergen, B (HYDR.D)
- Institut National d'Horticulture et de Paysage
- International Oak Society Tour (IOS)
- Iturraran Botanical Garden (ITURRA)
- Jardin Botanique de Gondremer, F (JBGOND)
- Jardin Botanique Université de Fribourg, CH (JBFRIB)
- Jardin Botanique de l'Université de Strasbourg, F (STRASB)
- Jardin Botanique de la Villa Thuret, F (THURET)
- Jardin Des Plantes De Montpellier, F (JDPDM)
- Les jardins de Ker Louis, Plévenon - Cap Fréhel, F (KERLOU)
- Jardin Exotique du Kestellic, Plouguiel, F (KESTEL)
- Kobe Municipal Arboretum, J (KOBEMA)
- Københavns Universitet Botanisk Have, DK (KUBH)
- Koishikawa Botanical Garden Tokyo, J (KOISBG)
- Kruidtuin Leuven, B (KL)
- Kwekerij-Plantencentrum Hulsdonk, NL (HULSD)
- Kyoto Botanical Garden, J (KYOTBG)
- Lanhydrock Bodmin, UK (LB)
- Latvia University Botanical Garden - Rhododendron Nursery, LV (BABITE)
- Leonarslee Gardens Nursery, UK (LNLGN)
- Logan Botanic Garden, UK (LBG)
- Lower Hills Arboretum, UK (LHILLS)
- Lullingstone Castle & The World Garden, UK (LUCAWG)
- Meon Orchard, UK (MEON)
- Merrigum, Neer, NL (MERRIG)
- Morris Arboretum of the University of Pennsylvania, USA (MORRIS)
- Morton Arboretum, USA (MORTON)
- National Botanic Garden of Wales, UK (WALES)
- Ness Botanic Gardens University of Liverpool, UK (NBGUL)
- Niigata Prefectural Botanical Garden, J (NIPRBG)
- Nikko Botanical Garden Nikko, J (NIKKO)
- Nymans, UK (NYM)
- Ökologisch-Botansicher Garten Universität Bayreuth, D (BAYREU)
- Parc Botanique de Château Pérouse, F [PBCPÉR]
- Pavia nursery, B (PAVIA)
- Pencarrow Washaway, UK (PW)
- Pinetum Anthoine, Jamioulx, B (PINANT)
- Pinetum Blijdenstein, Hilversum, NL (PBH)
- Plantentuin Antwerpen, B (PA)
- Plantentuin Meise, B (NPVBM)
- Plantentuin Universiteit Gent, B (HBUG)
- Polly Hill Arboretum, Massachusetts, USA, (POLHIL)
- Rancho Santa Ana Botanic Garden/California Botanic Garden, USA (RSABG)
- Royal Botanic Garden, Edinburgh, UK (RBGE)
- Royal Botanic Gardens Kew, UK (RBGK)
- Royal Horticultural Society Garden Wisley, UK (RHSGW)
- Royal Tasmanian Botanical Gardens, Hobart, AU (RTASBG)
- Salicetum Joost Verbeke, B (JOVERB)
- San Francisco Botanical Garden, USA (SFBG)
- Savill Garden, Windsor, UK (WINDSA)
- Singapore Botanic Garden, SG (SIPOBG)
- The Tasmanian Arboretum, Devonport, AU (TASARB)
- Tharandt Botanic Garden, D (THARBG)
- Trebah, Mawnan Smith, UK (TMS)
- Tregrehan Garden, UK (TPAR)
- Trelean Valley Garden, UK (TVG)
- Trengwainton Garden, Penzance, UK (TGP)
- Tresco Abbey Gardens, UK (TAG)
- Trevarno, Helston, UK (TH)
- Trewidden Penzance, UK (TP)
- Trewithen Gardens, UK (TG)
- Tuin de Geesthof, Achtmaal, NL (GEESTH)
- University of British Columbia Botanical Garden, CA (UBCBG)
- Valley Gardens, Windsor, UK (WINDVA)
- Ventnor Botanic Garden, UK (VBG)
- Von Gimborn Arboretum, Doorn, NL (VGAD)
- Wakehurst Place, Ardingly, UK (WPA)
- Westonbirt National Arboretum, UK (WBIRT)
- Windsor Great Park, Windsor, UK (WINDGP)