HABRANTHUS tubispathus
HAEMANTHUS sanguineus
HAKONECHLOA macra ‘Aureola’
HAKONECHLOA macra
HAKONECHLOA macra ‘Albolineata’
HAMAMELIS intermedia ‘Pallida’
HAMAMELIS vernalis ‘Sandra’
HEBE recurva
HEBE topiaria
HEDERA canariensis ‘Gloire de Marengo’
HEDERA helix ‘Arborescens’
HEDERA helix cultivar
HEDERA helix ‘Glymii’
HEDERA helix ‘Spetchley’
HEDERA helix ‘Erecta’
HEDYCHIUM densiflorum
HEDYCHIUM densiflorum ‘Assam Orange’
HEDYCHIUM forrestii
HEDYCHIUM gardnerianum
HELIANTHELLA quinquenervis
HELIANTHEMUM ‘Regenbogen’
HELIANTHEMUM ‘Wisley Primrose’
HELIANTHEMUM nummularium grandiflorum
HELIANTHEMUM strickeri
HELIANTHEMUM ‘Amabile Plenum’
HELIANTHUS
HELIANTHUS atrorubens
HELICHRYSUM acutatum
HELICHRYSUM ex. South Africa
HELICHRYSUM species
HELICHRYSUM splendidum
HELICHRYSUM ‘Schwefellicht’
HELICTOTRICHON sempervirens
HELLEBORUS ex. ‘Aprikose’
HELLEBORUS argutifolius
HELLEBORUS ‘Black Form’
HELLEBORUS ex. ‘Button’
HELLEBORUS dumetorum hybrids
HELLEBORUS ex. ‘Ahlberg’
HELLEBORUS ex. ‘Blowsy’
HELLEBORUS ex. ‘D-Roz’
HELLEBORUS ex. ‘Lynne’
HELLEBORUS ex. ‘Midnight Blues’
HELLEBORUS ex. ‘Salome’
HELLEBORUS ex. ‘Schwarzer Kreis’
HELLEBORUS ex. ‘Sunny’
HELLEBORUS foetidus
HELLEBORUS ex. ‘Greencups’
HELLEBORUS multifidus
HELLEBORUS niger ‘Maximus’
HELLEBORUS orientalis ‘Best Marked Pink’
HELLEBORUS orientalis guttatus
HELLEBORUS orientalis Early Purple Group
HELLEBORUS orientalis ‘Tall Dark Purple’
HELLEBORUS orientalis
HELLEBORUS viridis occidentalis
HELLEBORUS ‘Helen Ballard’
HELLEBORUS ex. ‘Parrot’
HELLEBORUS ‘Ushba’
HELLEBORUS sternii Boughton Group
HELLEBORUS odorus
HELLEBORUS viridis
HELLEBORUS cyclophyllus
HELLEBORUS niger
HELLEBORUS torquatus serbicus
HELLEBORUS sternii Cally Strain
HELLEBORUS croaticus
HELLEBORUS ‘Cally Double White’
HELLEBORUS sternii
HELLEBORUS niger macranthus
HELLEBORUS multifidus hercegovinus
HELLEBORUS torquatus hybrids
HELLEBORUS serbicus
HELLEBORUS ex. ‘Ushba’
HELLEBORUS torquatus
HELONIOPSIS orientalis
HEMEROCALLIS ‘Corky’
HEMEROCALLIS ‘Eenie Weenie’
HEMEROCALLIS ‘Green Flutter’
HEMEROCALLIS lilioasphodelus
HEMEROCALLIS ‘North Star’
HEMEROCALLIS ‘Sir Blackstem’
HEMEROCALLIS ‘Whichford’
HEMEROCALLIS fulva ‘Kwanso Variegata’
HEMEROCALLIS minor
HEMEROCALLIS ‘Lullaby Baby’
HEMEROCALLIS ‘Irish Elf’
HEMEROCALLIS middendorfiii
HEMEROCALLIS thunbergii
HEMEROCALLIS cultivar
HEMEROCALLIS ‘Happy Returns’
HEMEROCALLIS species ex. Japan
HEMEROCALLIS minor R230
HEMEROCALLIS ‘High Tor’
HEMEROCALLIS species ex. Korea
HEMEROCALLIS ‘Gentle Shepherd’
HEPATICA nobilis ‘Rubra Plena’
HEPATICA transsilvanica
HEPATICA transsilvanica ‘Blue Jewel’
HEPATICA transsilvanica ‘De Buis’
HEPATICA nobilis
HESPERALOE parviflora
HESPERANTHA petitiana
HESPERANTHA huttonii
HESPERIS matronalis ‘Alba Plena’
HESPERIS matronalis ‘Cally Dwarf’
HEUCHERA Cally hybrids
HEUCHERA cylindrica ‘Greenfinch’
HEUCHERA micrantha ‘Palace Purple’
HEUCHERA micrantha
HEUCHERA ‘Palace Purple’
HEUCHERA chlorantha ‘Cally Form’
HEUCHERA chlorantha
HEUCHERA ‘Lady Romney’
HEUCHERA pulchella
HEUCHERA ‘Rachel’
HEUCHERA villosa macrorhiza
HEUCHERA ‘Garnet’
HEUCHERA ‘Zabelliana’
HEUCHERA ‘Persian Carpet’
HEUCHERA ‘Montrose Ruby’
HIERACIUM lanatum
HIPPEASTRUM x acramannii
HOHERIA ‘Glory of Amlwch’
HOLBOELLIA coriacea
HORMINUM pyrenaicum dark form
HOSTA ‘Blue Cadet’
HOSTA clausa normalis
HOSTA dwarf ex. Japan
HOSTA fortunei rugosa
HOSTA ‘Frances Williams’
HOSTA ex. ‘Halcyon’
HOSTA ‘Krossa Regal’
HOSTA ‘Little Aurora’
HOSTA minor ‘Maekawa’
HOSTA nigrescens ‘Cally White’
HOSTA plantaginea
HOSTA sieboldiana
HOSTA sieboldiana elegans
HOSTA ‘Snow Flakes’
HOSTA tardiana ex. New Zealand
HOSTA tardiana
HOSTA ‘Halcyon’
HOSTA venusta
HOSTA tardiana hybrid
HOSTA nigrescens
HOSTA minor
HOSTA cultivar
HOSTA tokudama
HOSTA nakaiana
HOSTA species ex. Korea
HOSTA ‘Aureomarginata’
HOSTA ex. Japan
HOSTA lancifolia
HOSTA dwarf
HOSTA venusta dwarf
HOSTA fortunei hyacinthina
HOSTA ‘Tall Boy’
HOSTA ‘Zounds’
HOSTA fortunei aureomarginata
HOSTA ‘Blue Edger’
HOSTA nigrescens ‘Cally Form’
HOUTTUYNIA cordata
HOUTTUYNIA cordata ‘Chameleon’
HYDRANGEA anomala
HYDRANGEA anomala petiolaris
HYDRANGEA anomala petiolaris tiliifolia
HYDRANGEA arborescens ‘Annabelle’
HYDRANGEA arborescens discolor ‘Sterilis’
HYDRANGEA aspera ‘Macrophylla’
HYDRANGEA aspera sargentiana
HYDRANGEA aspera strigosa
HYDRANGEA aspera Villosa Group
HYDRANGEA integrifolia
HYDRANGEA paniculata ‘Brussels Lace’
HYDRANGEA paniculata ‘Everest’
HYDRANGEA paniculata ‘Grandiflora’
HYDRANGEA paniculata ‘Kyushu’
HYDRANGEA paniculata ‘Unique’
HYDRANGEA quercifolia
HYDRANGEA seemannii
HYDRANGEA serratifolia
HYDRANGEA species ex. China
HYDRANGEA anomola petiolaris ‘Brooklands’
HYDRANGEA quercifolia ‘Sike’s Dwarf’
HYDRANGEA quercifolia ‘Tennessee Clone’
HYDRANGEA anomala petiolaris cordifolia
HYDRANGEA macrophylla ‘Quadricolor’
HYDRANGEA macrophylla ‘Merveille Sanguine’
HYDRANGEA macrophylla ‘Möwe’
HYDROCOTYLE sibthorpioides ‘Variegata’
HYPERICUM bellum
HYPERICUM maclarenii
HYPERICUM olympicum minus
HYPERICUM olympicum minus ‘Sulphureum’
HYPERICUM ‘Rowallane’
HYPOXIS species
HYSTRIX patula