| Acanthaceae | Belfast Botanic Gardens
Birmingham Botanical Gardens & Glasshouses
University of Oxford Botanic Garden |
| Aceraceae | Batsford Arboretum
Dawyck Botanic Garden
Foxhill Arboretum
Glendoick Gardens
Hergest Croft Gardens
John F. Kennedy Arboretum
National Arboretum, Castlewellan
Ness Botanic Gardens
Royal Botanic Garden Edinburgh
Sheffield Park Garden
The Savill & Valley Gardens
Tregrehan
Trelissick
Wakehurst Place
Westonbirt Arboretum
Winkworth Arboretum |
| Actinidiaceae | Bristol Zoological Gardens |
| Adiantum | Tatton Park |
| Agavaceae | City of Liverpool Botanic Gardens
Fota Arboretum & Gardens
Ness Botanic Gardens
Trebah Garden Trust
Ventnor Botanic Garden |
| Aizoaceae | Birmingham Botanical Gardens & Glasshouses |
| Alismataceae | Ness Botanic Gardens |
| Alliaceae | Royal Botanic Gardens Kew |
| Aloaceae | Newhaven Botanic Garden
Royal Botanic Gardens Kew |
| Amaranthaceae | Ness Botanic Gardens |
| Amaryllidaceae | Exeter University
Ness Botanic Gardens
Royal Botanic Gardens Kew
The Harris Garden
Trelissick |
| Anacardiaceae | Ness Botanic Gardens |
| Apocynaceae | Belfast Botanic Gardens
Ness Botanic Gardens
Ventnor Botanic Garden |
| Aquifoliaceae | John F. Kennedy Arboretum
Ness Botanic Gardens
The National Botanic Gardens, Glasnevin
The Savill & Valley Gardens
Westonbirt Arboretum
Winkworth Arboretum |
| Araceae | Birmingham Botanical Gardens & Glasshouses
Royal Botanic Gardens Kew
University of Oxford Botanic Garden |
| Araliaceae | Arduaine Garden
Belfast Botanic Gardens
National Arboretum, Castlewellan
Ness Botanic Gardens
Ventnor Botanic Garden |
| Araucariaceae | Glendurgan Gardens
Royal Botanic Garden Edinburgh |
| Asclepiadaceae | The Harris Garden |
| Aspleniaceae | Chelsea Physic Garden |
| Begoniaceae | City of Liverpool Botanic Gardens
Glasgow Botanic Gardens
Ness Botanic Gardens |
| Berberidaceae | Dawyck Botanic Garden
Glendoick Gardens
John F. Kennedy Arboretum
Ness Botanic Gardens
Royal Botanic Garden Edinburgh
St Andrews Botanic Garden
The Savill & Valley Gardens |
| Betulaceae | Brogdale Horticultural Trust
Dawyck Botanic Garden
Glasgow Botanic Gardens
Glendoick Gardens
Hergest Croft Gardens
John F. Kennedy Arboretum
Ness Botanic Gardens
Royal Botanic Garden Edinburgh
Sheffield Park Garden
The Savill & Valley Gardens
Tregrehan
Wakehurst Place
Westonbirt Arboretum |
| Bignoniaceae | Belfast Botanic Gardens
Cliveden |
| Boraginaceae | Ness Botanic Gardens |
| Bromeliaceae | Birmingham Botanical Gardens & Glasshouses
City of Liverpool Botanic Gardens
Glasgow Botanic Gardens
Ness Botanic Gardens
Royal Botanic Gardens Kew
University of Bristol Botanic Garden |
| Buddlejaceae | Ness Botanic Gardens |
| Buxaceae | Capel Manor College |
| Cactaceae | Birmingham Botanical Gardens & Glasshouses
Exeter University
Glasgow Botanic Gardens
Ness Botanic Gardens
Newhaven Botanic Garden
Royal Botanic Gardens Kew
University of Oxford Botanic Garden |
| Campanulaceae | Ness Botanic Gardens |
| Cannaceae | Ventnor Botanic Garden |
| Caprifoliaceae | Exeter University
Royal Botanic Garden Edinburgh
St Andrews Botanic Garden
The Royal Horticultural Society's Garden Hyde Hall |
| Caryophyllaceae | University of Oxford Botanic Garden |
| Cephalotaxaceae | Bedgebury National Pinetum
Royal Botanic Garden Edinburgh |
| Cercidiphyllaceae | Ness Botanic Gardens |
| Chenopodiaceae | University of Oxford Botanic Garden |
| Cistaceae | Chelsea Physic Garden
Ness Botanic Gardens
University of Bristol Botanic Garden |
| Clethraceae | Glendoick Gardens |
| Compositae | Belfast Botanic Gardens
Exeter University
Glasgow Botanic Gardens
Inverewe Garden
National Arboretum, Castlewellan
Ness Botanic Gardens
Royal Botanic Gardens Kew
Torosay Castle & Gardens
Trebah Garden Trust
University of Oxford Botanic Garden
Ventnor Botanic Garden |
| Coriariaceae | University of Leicester Botanic Garden |
| Cornaceae | Ness Botanic Gardens
Sheffield Park Garden
Torosay Castle & Gardens
Trebah Garden Trust
Westonbirt Arboretum |
| Crassulaceae | Abbey Dore Court
The Harris Garden
Trebah Garden Trust
University of Bristol Botanic Garden
University of London Botanical Supply Unit |
| Cruciferae | Exeter University
University of Oxford Botanic Garden |
| Cupressaceae | Ardkinglas Woodland Garden
Bedgebury National Pinetum
Bicton Park Gardens
Cawdor Castle Gardens Estate
Exeter University
Glendurgan Gardens
John F. Kennedy Arboretum
Mount Edgecumbe Garden
Mount Stuart Gardens
National Arboretum, Castlewellan
Ness Botanic Gardens
Royal Botanic Garden Edinburgh
Sheffield Park Garden
The Harcourt Arboretum
The National Botanic Gardens, Glasnevin
Trebah Garden Trust
Wakehurst Place |
| Cyatheaceae | Belfast Botanic Gardens
Glasgow Botanic Gardens |
| Cycadaceae | Birmingham Botanical Gardens & Glasshouses |
| Davidiaceae | Ness Botanic Gardens |
| Dicksoniaceae | Glasgow Botanic Gardens
Ness Botanic Gardens |
| Droseraceae | The Harris Garden
|
| Dryopteridaceae | Chelsea Physic Garden |
| Elaeocarpaceae | Ness Botanic Gardens |
| Epacridaceae | National Arboretum, Castlewellan |
| Ericaceae | Abbotsbury Sub-Tropical Gardens
Ardkinglas Woodland Garden
Ardtornish Garden
Arduaine Garden
Birr Castle
Branklyn Garden
Brogdale Horticultural Trust
Caerhays Castle
Castle Kennedy Gardens
Dawyck Botanic Garden
Drumlanrig Castle
Exeter University
Glendoick Gardens
Glendurgan Gardens
Glenveagh Castle Gardens
Harlow Carr Botanical Gardens
Hergest Croft Gardens
Houghall College Gardens
Inverewe Garden
John F. Kennedy Arboretum
Logan Botanic Garden
Mount Edgecumbe Garden
Mount Stewart
National Arboretum, Castlewellan
Ness Botanic Gardens
Picton Castle
Royal Botanic Garden Edinburgh
Royal Botanic Gardens Kew
Sheffield Park Garden
St Andrews Botanic Garden
The Harcourt Arboretum
The National Botanic Gardens, Glasnevin
The Savill & Valley Gardens
The Sir Harold Hillier Gardens and Arboretum
Torosay Castle & Gardens
Trebah Garden Trust
Tregrehan
Trelissick
Wakehurst Place
Younger Botanic Garden, Benmore |
| Escalloniaceae | National Arboretum, Castlewellan
Royal Botanic Garden Edinburgh |
| Eucommiaceae | Ness Botanic Gardens |
| Eucryphiaceae | Mount Stuart Gardens
National Arboretum, Castlewellan
Ness Botanic Gardens
Torosay Castle & Gardens
Younger Botanic Garden, Benmore |
| Euphorbiaceae | Abbey Dore Court
Belfast Botanic Gardens
City of Liverpool Botanic Gardens
Ness Botanic Gardens
University of London Botanical Supply Unit
University of Oxford Botanic Garden |
| Fagaceae | Abbotsbury Sub-Tropical Gardens
Batsford Arboretum
Belfast Botanic Gardens
Caerhays Castle
Dawyck Botanic Garden
Glendoick Gardens
John F. Kennedy Arboretum
National Arboretum, Castlewellan
Queen's Wood Arboretum & Country Park
Quinta Arboretum
Royal Botanic Garden Edinburgh
Sheffield Park Garden
The Harcourt Arboretum
The Harris Garden
The Savill & Valley Gardens
The Sir Harold Hillier Gardens and Arboretum
Trebah Garden Trust
Tregrehan
Wakehurst Place
Westonbirt Arboretum |
| Flacourtiaceae | Exeter University
Picton Castle
Torosay Castle & Gardens
Trebah Garden Trust
Tregrehan
Trelissick
Ventnor Botanic Garden |
| Gentianaceae | Ness Botanic Gardens
Royal Botanic Garden Edinburgh |
| Geraniaceae | Chelsea Physic Garden
The Harris Garden
The National Botanic Gardens, Glasnevin
University of Bristol Botanic Garden |
| Gesneriaceae | Arduaine Garden
Belfast Botanic Gardens
Glasgow Botanic Gardens |
| Ginkgoaceae | Abbotsbury Sub-Tropical Gardens
Bedgebury National Pinetum
Ness Botanic Gardens |
| Gramineae | Abbotsbury Sub-Tropical Gardens
Batsford Arboretum
Belfast Botanic Gardens
Birmingham Botanical Gardens & Glasshouses
Exeter University
John F. Kennedy Arboretum
Royal Botanic Gardens Kew
The Harcourt Arboretum
Trebah Garden Trust |
| Grossulariaceae | Brogdale Horticultural Trust
Royal Botanic Garden Edinburgh |
| Hamamelidaceae | Caerhays Castle
Queen's Wood Arboretum & Country Park
Royal Botanic Garden Edinburgh
The Harcourt Arboretum
The Savill & Valley Gardens
The Sir Harold Hillier Gardens and Arboretum
Winkworth Arboretum |
| Helwingiaceae | Ness Botanic Gardens |
| Hydrangeaceae | Arduaine Garden
Royal Botanic Garden Edinburgh
The Savill & Valley Gardens
Trebah Garden Trust
Trelissick
Trelissick |
| Hypericaceae | Wakehurst Place |
| Inula | Tatton Park |
| Iridaceae | Arduaine Garden
Exeter University
Inverewe Garden
Ness Botanic Gardens
Royal Botanic Gardens Kew
The Harris Garden
University of Oxford Botanic Garden |
| Juglandaceae | The Savill & Valley Gardens |
| Labiatae | Chelsea Physic Garden
Exeter University
Logan Botanic Garden
Ness Botanic Gardens
Royal Botanic Gardens Kew
The Harris Garden
University of Bristol Botanic Garden
University of Oxford Botanic Garden
Ventnor Botanic Garden |
| Lauraceae | Tregrehan |
| Leguminosae | Abbotsbury Sub-Tropical Gardens
Belfast Botanic Gardens
Chilworth Botanic Garden
Exeter University
Royal Botanic Gardens Kew
The Harris Garden
University of Oxford Botanic Garden
Weaver's Cottage |
| Lentibulariaceae | The Harris Garden |
| Liliaceae | Birmingham Botanical Gardens & Glasshouses
Cliveden
Exeter University
Inverewe Garden
National Arboretum, Castlewellan
Ness Botanic Gardens
Royal Botanic Gardens Kew
The Harris Garden
The National Botanic Gardens, Glasnevin
Trebah Garden Trust
Treborth Botanic Garden |
| Magnoliaceae | Abbotsbury Sub-Tropical Gardens
Arduaine Garden
Batsford Arboretum
Birr Castle
Castle Kennedy Gardens
Glendoick Gardens
Glendurgan Gardens
Queen's Wood Arboretum & Country Park
Sheffield Park Garden
The Savill & Valley Gardens
The Sir Harold Hillier Gardens and Arboretum
Trebah Garden Trust
Tregrehan
Trelissick
Westonbirt Arboretum
Winkworth Arboretum
Younger Botanic Garden, Benmore |
| Malvaceae | Abbotsbury Sub-Tropical Gardens
Belfast Botanic Gardens
City of Liverpool Botanic Gardens
National Arboretum, Castlewellan |
| Marantaceae | Birmingham Botanical Gardens & Glasshouses
City of Liverpool Botanic Gardens |
| Mesembryanthemaceae | Newhaven Botanic Garden |
| Moraceae | Belfast Botanic Gardens |
| Musaceae | Royal Botanic Garden Edinburgh
University of Oxford Botanic Garden |
| Myrtaceae | Belfast Botanic Gardens
Birmingham Botanical Gardens & Glasshouses
Fota Arboretum & Gardens
John F. Kennedy Arboretum
Logan Botanic Garden
Mount Stewart
Mount Stuart Gardens
National Arboretum, Castlewellan
Picton Castle
Torosay Castle & Gardens
Trebah Garden Trust |
| Nepenthaceae | The Harris Garden |
| Nothofagaceae | Younger Botanic Garden, Benmore |
| Nymphaeaceae | University of Oxford Botanic Garden |
| Nyssaceae | Sheffield Park Garden |
| Oleaceae | Abbotsbury Sub-Tropical Gardens
Dawyck Botanic Garden
Exeter University
John F. Kennedy Arboretum
Quinta Arboretum
Royal Botanic Garden Edinburgh
Royal Botanic Gardens Kew |
| Orchidaceae | Birmingham Botanical Gardens & Glasshouses
Bristol Zoological Gardens
City of Liverpool Botanic Gardens
Glasgow Botanic Gardens
Royal Botanic Gardens Kew
The National Botanic Gardens, Glasnevin
The Royal Horticultural Society's Garden Wisley
University of Oxford Botanic Garden |
| Osmundaceae | Glasgow Botanic Gardens |
| Paeoniaceae | Birr Castle |
| Palmae | Belfast Botanic Gardens
Fota Arboretum & Gardens
Royal Botanic Gardens Kew
The Harris Garden
Trebah Garden Trust
University of Oxford Botanic Garden |
| Papaveraceae | Branklyn Garden
Glendoick Gardens
Houghall College Gardens
Torosay Castle & Gardens |
| Phormiaceae | Abbotsbury Sub-Tropical Gardens
Mount Stewart |
| Phyllocladaceae | Royal Botanic Garden Edinburgh |
| Pinaceae | Ardkinglas Woodland Garden
Batsford Arboretum
Bedgebury National Pinetum
Bicton Park Gardens
Birr Castle
Castle Kennedy Gardens
Cawdor Castle Gardens Estate
Cragside
Dawyck Botanic Garden
Drumlanrig Castle
Exeter University
Fota Arboretum & Gardens
Foxhill Arboretum
Glendoick Gardens
Hergest Croft Gardens
John F. Kennedy Arboretum
Mount Stuart Gardens
National Arboretum, Castlewellan
Ness Botanic Gardens
Queen's Wood Arboretum & Country Park
Quinta Arboretum
Royal Botanic Garden Edinburgh
Royal Botanic Gardens Kew
Sheffield Park Garden
The Harcourt Arboretum
The Harris Garden
The National Botanic Gardens, Glasnevin
The Savill & Valley Gardens
Torosay Castle & Gardens
Trebah Garden Trust
Tregrehan
Wakehurst Place
Westonbirt Arboretum |
| Piperaceae | Glasgow Botanic Gardens |
| Pittosporaceae | Abbotsbury Sub-Tropical Gardens
National Arboretum, Castlewellan
Trebah Garden Trust
Ventnor Botanic Garden |
| Platanaceae | Fota Arboretum & Gardens
Mottisfont Abbey Rose Garden |
| Podocarpaceae | Arduaine Garden
Bedgebury National Pinetum
Caerhays Castle
Glendurgan Gardens
Mount Edgecumbe Garden
National Arboretum, Castlewellan
Picton Castle
Royal Botanic Garden Edinburgh
Trebah Garden Trust
Tregrehan |
| Polypodiaceae | Belfast Botanic Gardens |
| Primulaceae | Glendoick Gardens
Ness Botanic Gardens
Royal Botanic Garden Edinburgh
Torosay Castle & Gardens |
| Proteaceae | Pine Lodge Gardens
Trebah Garden Trust
Tresco Abbey Gardens
University of Bristol Botanic Garden |
| Ranunculaceae | Cliveden
Exeter University
Fletcher Moss Botanical Gardens
Royal Botanic Gardens Kew
Sissinghurst Castle Garden
University of Oxford Botanic Garden |
| Rapateaceae | Royal Botanic Garden Edinburgh |
| Rhododendron | Tatton Park |
| Rosaceae | Abbotsbury Sub-Tropical Gardens
Batsford Arboretum
Birmingham Botanical Gardens & Glasshouses
Brogdale Horticultural Trust
Dawyck Botanic Garden
Dyffryn Gardens
Exeter University
Fletcher Moss Botanical Gardens
Glasgow Botanic Gardens
Glendoick Gardens
Glendurgan Gardens
Hergest Croft Gardens
Houghall College Gardens
John F. Kennedy Arboretum
Mottisfont Abbey Rose Garden
National Arboretum, Castlewellan
Ness Botanic Gardens
Queen's Wood Arboretum & Country Park
Royal Botanic Gardens Kew
Sheffield Park Garden
Sissinghurst Castle Garden
St Andrews Botanic Garden
The National Botanic Gardens, Glasnevin
The Royal Horticultural Society's Garden Hyde Hall
The Savill & Valley Gardens
Tregrehan
Trelissick
University of Bristol Botanic Garden
University of Oxford Botanic Garden
Winkworth Arboretum |
| Ruscaceae | Royal Botanic Garden Edinburgh |
| Rutaceae | Exeter University
Wakehurst Place |
| Salicaceae | Ness Botanic Gardens
Westonbirt Arboretum
Ness Botanic Gardens |
| Sarraceniaceae | The Harris Garden |
| Saxifragaceae | Exeter University
Royal Botanic Garden Edinburgh
Royal Botanic Gardens Kew
The National Botanic Gardens, Glasnevin
University of Leicester Botanic Garden |
| Sciadopityaceae | Royal Botanic Garden Edinburgh |
| Scrophulariaceae | Birmingham Botanical Gardens & Glasshouses
Exeter University
Fletcher Moss Botanical Gardens
Royal Botanic Gardens Kew
The Harris Garden
University of Bristol Botanic Garden
University of Oxford Botanic Garden
Ventnor Botanic Garden |
| Solanaceae | Belfast Botanic Gardens
University of London Botanical Supply Unit
University of Oxford Botanic Garden |
| Styracaceae | Holker Hall
Tregrehan |
| Symplocaceae | Caerhays Castle |
| Taxaceae | Bedgebury National Pinetum
Bicton Park Gardens
Fota Arboretum & Gardens
Royal Botanic Garden Edinburgh
The National Botanic Gardens, Glasnevin
Wakehurst Place |
| Taxodiaceae | Bedgebury National Pinetum
Bicton Park Gardens
Drumlanrig Castle
Fota Arboretum & Gardens
National Arboretum, Castlewellan
Ness Botanic Gardens
Queen's Wood Arboretum & Country Park
Royal Botanic Garden Edinburgh
Sheffield Park Garden
The Harcourt Arboretum
Wakehurst Place |
| Tetracentraceae | Ness Botanic Gardens |
| Theaceae | Abbotsbury Sub-Tropical Gardens
Birr Castle
Mount Edgecumbe Garden
National Arboretum, Castlewellan
Sheffield Park Garden
The Harcourt Arboretum
The Savill & Valley Gardens
Trebah Garden Trust
Tregrehan
Trelissick |
| Tiliaceae | Dawyck Botanic Garden
John F. Kennedy Arboretum
Trelissick
Westonbirt Arboretum |
| Trochodendraceae | Ness Botanic Gardens |
| Tropaeolaceae | National Arboretum, Castlewellan |
| Ulmaceae | Hergest Croft Gardens
Royal Botanic Garden Edinburgh |
| Umbelliferae | The Harris Garden
University of Oxford Botanic Garden
Ventnor Botanic Garden |
| Verbenaceae | Bristol Zoological Gardens |
| Violaceae | Bristol Zoological Gardens |
| Vitaceae | Brogdale Horticultural Trust
Trelissick |
| Winteraceae | National Arboretum, Castlewellan
Trebah Garden Trust |
| Zamiaceae | The National Botanic Gardens, Glasnevin |
| Zingiberaceae | Birmingham Botanical Gardens & Glasshouses
Bristol Zoological Gardens
Wakehurst Place |