Gunnera manicata Gunnera tinctoria
Guzmania x 'Orangeade' Guzmania x 'Rana'
Guzmania x 'Spendreit' Guzmania x 'Vella Red'
Guzmania 'Ada' Guzmania 'Irene'
Guzmania 'Marjan' Guzmania 'Symphonic'
Guzmania amaranth Guzmania lingulata 'Minor'
Guzmania sanguinea Gymnaster savatieri
Gymnocalycium bruchii var. albiepimun Gymnocalycium denudatum
Gymnocalycium multiflorum Gymnocarpium dryopteris
Gymnocarpium dryopteris 'Plumosum' Gymnocladus dioicus
Gymnocladus dioicus 'Espresso' Gymnocladus dioicus 'Variegata'
Gynura aurantiaca Gynura aurantiaca 'Purple Passion'
Gynura bicolor Gypsophila x 'Rose Schonheir'
Gypsophila cerastioides Gypsophila elegans
Gypsophila muralis 'Gypsy' Gypsophila muralis 'Gypsy Deep Rose'
Gypsophila paniculata Gypsophila paniculata 'Bristol Fairy'
Gypsophila paniculata 'Compacta Plena' Gypsophila paniculata 'Festival'
Gypsophila paniculata 'Festival Star Baby's Breath' Gypsophila paniculata 'Happy Festival'
Gypsophila paniculata 'Perfecta' Gypsophila paniculata 'Pink Fairy'
Gypsophila repens 'Rosea' Habenaria lacera
Habenaria rhodochelia Habranthus robustus
Habranthus robustus 'Russell Manning' Habranthus tubispathus
Haemanthus coccineus Haematoxylon brasiletto
Hakea 'Burrendong Beauty' Hakea bucculenta
Hakonechloa macra 'Albo Strata' Hakonechloa macra 'All Gold'
Hakonechloa macra 'Aureola' Hakonechloa macra 'Beni-Kaze'
Halesia diptera Halesia diptera var. magniflora
Halesia monticola Halesia tetraptera
Halesia tetraptera 'Rosea' X Halimiocistus wintonensis
Halimium lasianthum Hamamelis x intermedia 'Arnold's Promise'
Hamamelis x intermedia 'Barnsted Gold' Hamamelis x intermedia 'Diana'
Hamamelis x intermedia 'Hiltenbury' Hamamelis x intermedia 'Jelena'
Hamamelis x intermedia 'Luna' Hamamelis x intermedia 'Primavera'
Hamamelis x intermedia 'Ruby Glow' Hamamelis japonica var. flavopurpurascens
Hamamelis mollis Hamamelis mollis 'Brevipetala'
Hamamelis mollis 'Pallida' Hamamelis mollis 'Princeton Gold'
Hamamelis vernalis Hamamelis vernalis 'Autumn Embers'
Hamamelis vernalis 'Carnea' Hamamelis vernalis 'Christmas Cheer'
Hamamelis vernalis 'Purpurea' Hamamelis vernalis 'Sandra'
Hamamelis virginiana Hamamelis virginiana 'Little Suzie'
Hamelia patens X Hamelwellsara 'Indigo Sue'
Haplopappus glutinosus Hardenbergia violacea
Hardenbergia violacea 'Happy Wanderer' Harpephyllum caffrum
Harpullia hillii Harpullia pendula
Harrisia gracilis Hatiora gaertneri
Haworthia cymbiformis ssp. setulifera Haworthia fasciata
Haworthia limifolia var. keithii Haworthia reinwardtii var. reinwardtii
Haworthia spp.