Trees and Shrubs On-Line

We all flock to the Internet to find information about plants, but not all information sources are created equal. Without question, the finest source of information about woody plants for researchers and plant geeks is Trees and Shrubs Online. What started as an effort to digitize one of the worlds best woody plant books, W.J. Bean’s, 1914 classic, Trees and Shrubs Hardy in the British Isles, has taken on a life of its own. William Jackson Bean (1863-1947) of Kew Gardens, was a superb plantsman, and writer with a particular interest in woody plants.

The book was updated several times through the years, until the 1970s, with a supplement in 1988, but nothing in recent years, as the influx of new woody plants continued to grow. In 2017, The International Dendrology Society took on the project as a major, free-access, on-line update encompassing all woody plants of the temperate world. This project is now overseen by retired Kew Head of Gardens, Tony Kirkham, with our friend, Dr. John Grimshaw, as Editor-in-Chief. John merged his, (and co-author Ross Bayton’s) 2009 book, New Trees, into the project.

The site currently contains over 14,000 articles and over 20,000 images. Yearly usage is nearly 500,000 people. You’ll see a number of references and images on the site to both JLBG and the JC Raulston Arboretum. Completing the project depends on support from those who are passionate about trees and other woody plants. In fact, you can help by financially adopting a plant genus. To do so, you can contact the project at info@treesandshrubsonline.org

The genera and genera sections that have been completed so far, are listed below.

• Abelia – published April 2021
• Abies – published June 2021
• Acanthus – published February 2019
• Acer (genus account) – published September 2020
• Acer (North American species) – published May 2024
  (Section Acer (A. floridanum; A. grandidentatum; A. leucoderme; A. nigrum; A. saccharum and A. skutchii); Section Glabra (A. glabrum); Section Macrophylla (A. macrophyllum); Section Negundo (A. negundo); Section Palmata (A. circinatum); Section Rubra (A. rubrum, A. saccharinum and their hybrid A. × freemanii) and Section Spicata (A. spicatum)
• Acer Section Acer (Eurasian species) – published November 2020
  (A. caesium; A. × coriaceum; A. granatense; A. heldreichii; A. hyrcanum; A. monspessulanum; A. obtusifolium; A. opalus; A. × pseudoheldreichii; A. pseudoplatanus; A. sempervirens; A. velutinum)
• Acer Section Macrantha – published July 2020
  (A. capillipes; A. caudatifolium; A. chienii; A. × conspicuum; A. crataegifolium; A. davidii; A. forrestii; A. komarovii; A. laxiflorum; A. maximowiczii; A. metcalfii; A. micranthum; A. pectinatum; A. pensylvanicum; A. rubescens; A. rufinerve; A. sikkimense; A. tegmentosum; A. tschonoskii; and the unattributed selections A. ‘Candy Stripe’; A. ‘Cascade’; A. ‘Gimborn’; A. ‘Mindavi’; A. ‘Red Flamingo’; A. ‘Serpentine’; A. ‘Silver Cardinal’; A. ‘Silver Ghost’; A. ‘White Tigress’)
• Acer Section Palmata Series Sinensia – published September 2020
  (A. calcaratum; A. campbellii; A. elegantulum; A. erianthum; A. fenzelianum; A. flabellatum; A. oliverianum; A. pubinerve; A. serrulatum; A. sinense; A. tonkinense; A. wilsonii)
• Acer Section Platanoidea – published November 2020
  (A. amplum; A. campestre; A. cappadocicum; A. chapaense; A. divergens; A. fulvescens; A. × hillieri; A. lobelii; A. longipes; A. miaotaiense; A. miyabei; A. okamotoanum; A. pictum; A. platanoides; A. shenkanense; A. tenellum; A. tibetense; A. turkestanicum; A. truncatum; A. × zoeschense; and the unattributed selection A. ‘Gold Coin’)
• Alniphyllum – published June 2018
• Alnus – published March 2024
• Anagyris – published April 2022
• Anarthrophyllum – published April 2022
• Anthyllis – published March 2023
• Araucaria – published October 2018
• Arbutus – published April 2021
• Asterotrichion – published December 2022
• Astragalus – published March 2023
• Broussonetia – published January 2022
• Buddleja – African and American species published January 2021, Asian species and hybrids published December 2021
• Carpinus – published May 2022
• Carrierea – published February 2022
• Carya – published July 2020
• Cedrus – published June 2020
• Ceratostigma – published April 2021
• Cercidiphyllum – published July 2021
• Chionanthus – published October 2022
• Cladrastis – published February 2021
• Corylus – published April 2023
• + Crataegomespilus – published February 2023
• × Crataemespilus – published February 2023
• Crinodendron – published October 2022
• Cyclocarya – published July 2020
• Davidia – published 2019
• Desfontainia – published July 2023
• Diabelia – published April 2021
• Diervilla – published August 2019
• Dipelta – published April 2021
• Distylium – published May 2024
• Distylium x Parrotia – published May 2024
• Distyliopsis – published May 2024
• Embothrium – published November 2023
• Emmenopterys – published 2019
• Engelhardia – published July 2019
• Enkianthus – published January 2023
• Erinacea – published December 2021
• Eucommia – published January 2023
• Eucryhpia – published February 2019
• Euptelea – published January 2023
• Fagus – published August 2019
• Fitzroya – published 2018
• Forsythia – published April 2022
• Glyptostrobus – published July 2023
• Halesia – published July 2019
• Heptacodium – published July 2019
• Hibbertia – published October 2018
• Hippocrepis – published February 2023
• Hoheria – published October 2021
• Idesia – published February 2022
• Itoa – published February 2022
• Juglans – published February 2020
• Kalopanax – published September 2023
• Kolkwitzia – published August 2019
• Lagarostrobos – published February 2022
• Leycesteria – published August 2021
• Lindera – published August 2023
• Linnaea – published February 2021
• Liquidambar – published June 2021
• Liriodendron – published January 2019
• Lupinus – published February 2023
• Lyonothamnus – published September 2020
• Magnolia – published May 2022
• Margyricarpus – published December 2020
• Malus – published April 2021
• Manoao – published February 2022
• Meliosma – published March 2022
• Mespilus – published February 2023
• Metasequoia – published July 2021
• Morus – published June 2022
• Neoshirakia – published February 2019
• Nothofagus – published December 2020
• Nyssa – published June 2021
• Ononis – published March 2023
• Ostrya – published May 2022
• Ostryopsis – published May 2022
• Oxydendrum – published June 2021
• Paeonia – published December 2020
• Parrotia – published May 2024
• Parrotiopsis – published May 2024
• Paulownia – published September 2022
• Perkinsiodendron – published October 2019
• Pilgerodendron – published October 2018
• Plagianthus – published November 2022
• Platycarya – published February 2020
• Platyosprion – published February 2021
• Plumbago – published April 2021
• Podocarpus – published July 2023
• Poliothyrsis – published February 2022
• Polylepis – published June 2022
• Pterocarya – published February 2020
• Pterostyrax – published December 2017
• Pseudotaxus – published July 2020
• Pseudotsuga – published October 2023
• Quercus Section Ilex – published February 2021
  (Q. acrodonta; Q. alnifolia; Q. aquifolioides; Q. aucheri; Q. × auzendei; Q. baloot; Q. baronii; Q. coccifera; Q. cocciferoides; Q. dolicholepis; Q. engleriana; Q. floribunda; Q. franchetii; Q. gilliana; Q. guyavifolia; Q. ilex; Q. lanata; Q. leucotrichophora; Q. lodicosa; Q. longispica; Q. monimotricha; Q. pannosa; Q. phillyreoides; Q. rehderiana; Q. rotundifolia; Q. semecarpifolia; Q. senescens; Q. setulosa; Q. spinosa; Q. tarokoensis; Q. tatakaensis; Q. tungmaiensis; Q. utilis)
• Quercus Section Cerris – published July 2021
  (Q. acutissima; Q. afares; Q. brantii; Q. castaneifolia; Q. cerris; Q. chenii; Q. euboica; Q. hispanica; Q. ithaburensis; Q. × libanerris; Q. libani; Q. look; Q. macrolepis; Q. × numidica; Q. × schneideri; Q. suber; Q. trojana; Q. variabilis)
• Quercus Section Cyclobalanopsis – published August 2022
  (Q. acuta; Q. augustini; Q. bambusifolia; Q. delavayi; Q. gilva; Q. glauca; Q. hondae; Q. hypargyraea;Q. kiukiangensis; Q. lamellosa; Q. lobbii; Q. longinux; Q. macrocalyx; Q. morii; Q. myrsinifolia; Q. oxyodon; Q. poilanei; Q. salicina; Q. schottkyana; Q. sessilifolia; Q. stenophylloides)
• Rehderodendron – published October 2020
• Rhoiptelea– published March 2020
• Sciadopitys – published April 2023
• Sequoia – published March 2024
• Sequoiadendron – published March 2024
• Sinojackia – published December 2019
• Staphylea – published October 2018
• Stewartia – published 2017
• Styrax – published 2017
• × Sycoparrotia – published May 2024
• Sycopsis – published May 2024
• Symphoricarpos – published June 2021
• Tetracentron – published February 2024
• Thujopsis – published August 2021
• Tilia – published September 2020
• Toona – published May 2024
• Trochodendron – published November 2022
• Ulex – published December 2022
• Vesalea – published April 2021
• Weigela – published March 2020
• Zabelia – published April 2021
• Zelkova – published October 2023
• Zenobia – published July 2021