| HALESIA |
| HALESIA carolina |
| HALESIA diptera 'var. magniflora' |
| HALESIA monticola 'Rosea' |
| HALESIA monticola 'Variegata' |
| HALESIA monticola 'var. vestita' |
| HAMAMELIS |
| HAMAMELIS intermedia 'Amanon' |
| HAMAMELIS intermedia 'Antoinr Kort' |
| HAMAMELIS intermedia 'Aphrodite' |
| HAMAMELIS intermedia 'Arnold Promise' |
| HAMAMELIS intermedia 'Aurora' |
| HAMAMELIS intermedia 'Barmstedt Gold' |
| HAMAMELIS intermedia 'Birgit' |
| HAMAMELIS intermedia 'Boskoop' |
| HAMAMELIS intermedia 'Brandes' |
| HAMAMELIS intermedia 'Copper Cascade' |
| HAMAMELIS intermedia 'Cyrille' |
| HAMAMELIS intermedia 'Diane' |
| HAMAMELIS intermedia 'Fire Blaze' |
| HAMAMELIS intermedia 'Friesia' |
| HAMAMELIS intermedia 'Harlow Carr' |
| HAMAMELIS intermedia 'Jelena' |
| HAMAMELIS intermedia 'Limelight' |
| HAMAMELIS intermedia 'Livia' |
| HAMAMELIS intermedia 'Luna' |
| HAMAMELIS intermedia 'Nina' |
| HAMAMELIS intermedia 'Orange Beauty' (= 'August Lamken') |
| HAMAMELIS intermedia 'Orange Dream' |
| HAMAMELIS intermedia 'Orange Peel' |
| HAMAMELIS intermedia 'Pallida' |
| HAMAMELIS intermedia 'Parasol' |
| HAMAMELIS intermedia 'Primavera' |
| HAMAMELIS intermedia 'Rochester' |
| HAMAMELIS intermedia 'Ruby Glow' |
| HAMAMELIS intermedia 'Sister Jelena' |
| HAMAMELIS intermedia 'Spanish Spider' |
| HAMAMELIS intermedia 'Strawberries and Cream' |
| HAMAMELIS intermedia 'Sunburst' |
| HAMAMELIS intermedia 'Westerstede' |
| HAMAMELIS japonica 'Pendula' |
| HAMAMELIS japonica ''Zuccariniana' |
| HAMAMELIS vernalis 'Amethyst' (= 'Purple Seeding') |
| HAMAMELIS vernalis 'Lombarts Weeping' |
| HAMAMELIS vernalis 'Pendula' |
| HAMAMELIS vernalis 'Quasimodo' |
| HAMAMELIS vernalis 'Sandra' |
| HAMAMELIS virginiana |
| HEDERA |
| HEDERA helix 'Erecta' |
| HEPTACODIUM |
| HEPTACODIUM miconioides |
| HIBISCUS |
| HIBISCUS syriacus 'Marina' |
| HIBISCUS syriacus 'Mathilde' |
| HIBISCUS syriacus 'Melroze' |
| HIBISCUS syriacus 'Melroze' |
| HIBISCUS syriacus 'Melwhite' |
| HIBISCUS syriacus 'Pink Giant' |
| HIBISCUS syriacus 'Woodbridge' |
| HUMULUS |
| HUMULUS lupinus 'Excellent Dwarf' |
| HYDRANGEA |
| HYDRANGEA anomala 'Brookside Littleleaf' |
| HYDRANGEA arborescens 'Pink Pincushion' |
| HYDRANGEA aspera 'Rocklon' |
| HYDRANGEA aspera 'Rowallane' |
| HYDRANGEA aspera 'Taiwan Pink' |
| HYDRANGEA glabrata |
| HYDRANGEA heteromalla 'Bretschneideri' |
| HYDRANGEA heteromalla 'Krista' |
| HYDRANGEA involucrata 'Plena' |
| HYDRANGEA involucrata 'Yokudanka' |
| HYDRANGEA luteo-venosa |
| HYDRANGEA macrophylla 'Ayesha' |
| HYDRANGEA macrophylla 'Endless Summer' 'The Bride' |
| HYDRANGEA macrophylla 'Green Shadow' |
| HYDRANGEA macrophylla 'Hannabi' |
| HYDRANGEA macrophylla 'Hatsushimo' |
| HYDRANGEA macrophylla 'Iroshidori' |
| HYDRANGEA macrophylla 'Ito Shiofuki Kaigan Shibori' |
| HYDRANGEA macrophylla 'Jogasaki' |
| HYDRANGEA macrophylla 'Jumbo' |
| HYDRANGEA macrophylla 'Komochiana seruka' |
| HYDRANGEA macrophylla 'Kuro hime' |
| HYDRANGEA macrophylla 'Libelle' (Teller White) |
| HYDRANGEA macrophylla 'Mariesii Perfecta' |
| HYDRANGEA macrophylla 'Sea Foam' |
| HYDRANGEA macrophylla 'Shin Ozaki' |
| HYDRANGEA macrophylla 'Sumidano hanabi' |
| HYDRANGEA macrophylla 'Tricolor' |
| HYDRANGEA macrophylla 'Uzu azi sai' |
| HYDRANGEA macrophylla 'Veitchii' |
| HYDRANGEA macrophylla 'Veerle' |
| HYDRANGEA macrophylla 'Warabe' |
| HYDRANGEA macrophylla 'Zhuni hito' |
| HYDRANGEA macrophylla 'Zorro' |
| HYDRANGEA paniculata 'Bulk' (Early Sensation) |
| HYDRANGEA paniculata 'Compact form' |
| HYDRANGEA paniculata 'Ruby' ('Angel's Blush') |
| HYDRANGEA paniculata 'Vanille Fraise' |
| HYDRANGEA quercifolia 'Alice' |
| HYDRANGEA quercifolia 'Snow Queen' |
| HYDRANGEA quercifolia 'Tennessee Clone' |
| HYDRANGEA seemannii |
| HYDRANGEA serrata 'Belladonna' |
| HYDRANGEA serrata 'Blue Billow' |
| HYDRANGEA serrata 'Blue Bird' |
| HYDRANGEA serrata 'Hallason Korean' |
| HYDRANGEA serrata 'Hyuga Konjyo' |
| HYDRANGEA serrata 'Itsusai benigaku' |
| HYDRANGEA serrata 'Kiyosumi' |
| HYDRANGEA serrata 'Kurenai nishiki' |
| HYDRANGEA serrata 'Matsuhime' |
| HYDRANGEA serrata 'Momoiro yama ajisai' |
| HYDRANGEA serrata 'Mount Aso' |
| HYDRANGEA serrata 'Mount Dandenong' |
| HYDRANGEA serrata 'Ohisi' |
| HYDRANGEA serrata 'Preziosa' |
| HYDRANGEA serrata 'Prolifera' |
| HYDRANGEA serrata 'Pulchra' |
| HYDRANGEA serrata 'Shiro Fuji' |
| HYDRANGEA serrata 'Shiro maiko' |
| HYDRANGEA serrata 'Spreading Beauty' |
| HYDRANGEA serrata 'Tarin benigaku' |
| HYDRANGEA serrata 'Woodlanders' |
| HYDRANGEA serrata 'Yuno amacho' |
| HYDRANGEA villosa 'Anthony Bullivent' |
| HYPERICUM |
| HYPERICUM elite 'Major' |
| HYPERICUM elite 'Marron' |
| HYPERICUM x 'Hidcote' |
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