Completed Groups
As of 1 April 2025 Trees and Shrubs Online contains nearly 15,000 individual articles on woody plants hardy in the northern temperate zones, illustrated by over 23,500 images. Over half these articles represent brand new text specially commissioned for Trees and Shrubs Online; these articles comprise the accounts of the nearly 150 genera listed below that we have revised in full to date. The remainder of the articles are derived from the Eighth Edition of Bean’s Trees and Shrubs Hardy in the British Isles (1976–81) together with the Supplement (1988) and from New Trees: Recent Introductions to Cultivation (2009); these will be updated as funding becomes available.
The following list identifies the major groups that have been fully updated so far. It is updated whenever a new account is published:
- Abelia – published April 2021
- Abeliophyllum – published December 2024
- 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’) - Ailanthus – published January 2025
- 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
- Austrocedrus – published March 2025
- Azara – published April 2025
- 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
- Cotinus – published January 2025
- + 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
- Drimys – published April 2025
- Embothrium – published November 2023
- Emmenopterys – published 2019
- Engelhardia – published July 2019
- Enkianthus – published January 2023
- Erinacea – published December 2021
- Eucommia – published January 2023
- Eucryphia – published February 2019
- Euptelea – published January 2023
- Fagus – published August 2019
- Fitzroya – published 2018
- Forsythia – published April 2022
- Glyptostrobus – published July 2023
- Gynatrix – published February 2023
- Halesia – published July 2019
- Heptacodium – published July 2019
- Hibbertia – published October 2018
- Hippocrepis – published February 2023
- Hoheria – published October 2021
- Hydrangea – published May 2025
- Idesia – published February 2022
- Itoa – published February 2022
- Juglans – published February 2020
- Kalopanax – published September 2023
- Kolkwitzia – published August 2019
- + Laburnocytisus – published October 2024
- Laburnum – published October 2024
- Lagarostrobos – published February 2022
- Leycesteria – published August 2021
- Lindera – published August 2023
- Linnaea – published February 2021
- Liquidambar – published June 2021
- Liriodendron – published January 2019
- Loropetalum – published April 2025
- Lotus – published April 2023
- Lupinus – published February 2023
- Lyonothamnus – published September 2020
- Magnolia – published May 2022
- Margyricarpus – published December 2020
- Malus – published April 2021
- Manoao – published February 2022
- Melia – published January 2025
- 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
- Paliurus – published November 2024
- Parrotia – published May 2024
- Parrotiopsis – published May 2024
- Paulownia – published September 2022
- Perkinsiodendron – published October 2019
- Petteria – published October 2024
- Picrasma – published December 2024
- Pilgerodendron – published October 2018
- Plagianthus – published November 2022
- Platycarya – published February 2020
- Platyosprion – published February 2021
- Plumbago – published April 2021
- Podocarpus – published July 2023
- Podocytisus – published October 2024
- Poliothyrsis – published February 2022
- Polylepis – published June 2022
- Pterocarya – published February 2020
- Pterostyrax – published December 2017
- Pseudotaxus – published July 2020
- Pseudotsuga – published October 2023
- Pseudowintera – published April 2025
- 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
- Sassafras – published November 2024
- Saxegothaea – published March 2025
- 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
- Symplocos – published December 2024
- Tasmannia – published April 2025
- Tetracentron – published February 2024
- Tetrapanax – published April 2025
- 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
- Ziziphus – published November 2024