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International Dendrology Society

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International Dendrology Society

The official International Dendrology Society page.

The aims are to promote the study and enjoyment of trees and other woody plants, to bring together dendrologists from all round the world, and to protect and conserve rare and endangered plants.

26/04/2026

A study day not to miss at Newby Hall in Yorkshire on 17th June “ The Diversity of Dogwoods - A Study Day on Cornus“. This study day is open to all. To register go to link in Bio.
1. Cornus kousa
2. Cornus alternifolia
3. Cornus florida ‘Rainbow’
4. Cornus contraversa ‘Variegata’
5. Cornus kousa var. chinensis ‘Wisley Queen’
6. Cornus officinalis in Seoul S Korea
7. Cornus officinalis ‘Kentoki’
8. Cornus kousa ‘Big Apple’ at Gresgarth
9. Cornus nuttalii In Ninfa
10. Cornus kousa fruit in Shennongjia NP China
11. Cornus kousa ‘Satomi’
12. Cornus alba ‘Sibirica’ at Hilliers Gardens
13. Cornus hongkongensis ‘Shirotae’ In Japan
14. Cornus contraversa Aomori Japan
15. Cornus kousa

24/04/2026

Young IDS members do not miss this amazing bank holiday weekend tour in Wales visiting Bodnant, Ness Botanic Gardens, Crüg Nursery and more details on the website. 1-4th of May

22/04/2026

On the 19th of May the IDS cocktail party has moved venue to the Thames Royal Yacht Club at 60 Knightsbridge London SW1. It overlooks Hyde Park and has a lift. It is our yearly event for all members to meet up during Chelsea Flower Show week and we hope many of you will join us. To book go to the link in the bio.

21/04/2026

AESCULUS STUDY DAYS 9-10th MAY
Do not miss this opportunity to learn all about Aesculus at the incredible Kalmthout arboretum in Belgium.
Link in bio to register

Aesculus are handsome shrubs and trees from the northern hemisphere. Most species come from North America and Asia, but there are also several hybrids and many named cultivars. While Aesculus hippocastanum may be the flagship and the most well-known horsechestnut for Europeans, there are many more to plant and enjoy in parks, gardens and pots.

On Saturday we’ll have talks on the species and hybrids and their use, followed by a visit of Arboretum Kalmthout with special attention on Aesculus. There is an exhibit with Aesculus inspired and Aesculus designed objects in the gallery of the arboretum.

On Sunday there is the option to visit Arboretum Oudenbosch, their flagship species is Aesculus. This entirely volunteer-run arboretum in The Netherlands is less than 30 minutes driving from Kalmthout. Mid-afternoon everybody can make their own way back home.

This study day is a shared initiative between the International Dendrology Society and the Belgian Dendrology Society, offering an excellent opportunity to meet members from both organisations.

1. Aesculus wilsonii
2. Aesculus pavia ‘Humilis’
3. Aesculus x missisipiensis
4. Aesculus x mutabilis ‘Induta’
5. Aesculus hippocastanum ‘Baumannii’

20/04/2026

Monday ID quiz : Does anyone know this maple possibly from Sichuan in China ?

20/04/2026

The countdown has begun to The IDS Summer Cocktail Party

Taking place during the same week as the RHS Chelsea Flower Show, the IDS Cocktail Party returns on the 19th of May in an elegant new setting at The Royal Thames Yacht Club in Knightsbridge.

Hosted within the ground floor Britannia Bar, with a private outdoor deck offering a rare vantage point over the plane trees of Hyde Park, guests are invited to gather for an evening of conversation, cocktails and canapés, set against the backdrop of early summer in the city – let’s hope for good weather!

This year the IDS Cocktail Party is kindly supported by Sapling Spirits, a pioneering brand placing sustainability at the forefront of its production. Committed to being climate positive, Sapling plants a tree for every bottle sold, with each one traceable through its tree tracker—creating a transparent and tangible link between every purchase and its environmental impact.

Members only event! Please go to website or see your emails to buy tickets.

20/04/2026

IDS tour of Spain
Our last visit was to Monte della Torre founded by the Larios family from Gibraltar where the current generation are engaged in cork farming.
1-3. Ben Agnew explaining the harvesting of cork from this 250 year old Quercus suber.
Cork is harvested every 9 years in July once trees reach 30 years.
4. It is done by hand using this special axe
5. Some of the many products made with cork from wallets to aprons
6-7. Large Camphora officinalis
8. Araucaria heterophylla
9. Camellia sp.
10. Wigandia urens
11. Strelitzia sp.
12. Large Magnolia grandiflora with a lot of epicoic growth
13. Ben Agnew with IDS President John Palmer
14. The delicious paella lunch
15-17. The area is full of water and everywhere there are stork nests.
Thank you to and .landseer for organising this wonderful tour.

19/04/2026

IDS tour of Spain
A visit to a private garden owned by a Gibraltarian. An English garden in a native forest.
1-3. Quercus canariensis
4. Salvia salvifolius
5. Pond with a 8 year old Salix Babylonica
6. Gladioli byzantinus and Equisetum
7-8. Quercus suber the cork oak
9. No mow grass Zoysia tenuifolia
10. Quercus coccifera
11. Colocasia esculenta Taro
12. Native Rhododendron ponticum subsp. baeticum brought by Phoenicians 3 BC
13. Quercus feruginea
14. Gunnera manicata

18/04/2026

IDS tour of Spain
A walk through the Parque Maria Luisa in Seville designed by Forestier
1-4 An avenue of Bauhinia purpurea
5-6. Taxodium distichum surrounded by a marble sculpture
7. Bougainvillea
8. Punica granatum with double flower
9. Viburnum odorantissimum
10-12. Melia azedarach
Back in Jerez de la Frontera in the Tio Pepe garden
13. Russelia equisetiformis
14. Buxus balearica
15. Brachychiton acerifolius
16-17. Araucaria columnaris
Dinner in the Palace of the last Count of the Andes
18. Persea americana Avocado flowers
19. Hibiscus x rosa sinensis
20. Garden of Palacio del Virrey Laserna

17/04/2026

IDS tour of Spain
Day in Sevilla to visit the Alcazar and the Parque Maria-Luisa
The gardens of the Alcazar
1. Ceiba pentandra
2-3. Alcazar
4-5. Rose possibly ‘Pierre de Ronsard’
6. Ceiling in the Alcazar
7. Wall trained Seville oranges 🍊
8. Hedge of pomegranate Punica granatum
9. Justicia adhatoda
10. General view
11. Ceiba pentandra leaves
12. Cycas revoluta
13. Philadelphus coronaria
14. Phytolacca dioica
15-16. Dombeya wallichii
17. Pachygone laurifolia
18. Chamaerops humilis one of the oldest plants in the garden a native palm
19. Washingtonia filifera var robusta
20. Dolichandra unguis-cati Bignoniaceae

Dirección

Algeciras

Página web

http://www.dendrology.org/

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