Haageocereus chosicensis
Habenaria carnea
Habenaria tridactylites
Haberlea ferdinandi-coburgii
Haberlea rhodopensis
Haberlea rhodopensis 'Virginalis'
Habranthus brachyandrus
Habranthus gracilifolius
Habranthus martinezii
Habranthus oaxacanus
Habranthus tubispathus
Habranthus versicolor
Hacquetia epipactis
Hacquetia epipactis 'Thor'
Haemanthus albiflos
Haemanthus coccineus
Haemanthus humils hirsutus
Haemanthus montanus
Hagenia abyssinica
Hakea elliptica
Hakea laurina
Hakonechloa macra
Hakonechloa macra 'Alboaurea'
Hakonechloa macra 'All Gold'
Hakonechloa macra 'Aureola'
Halesia carolina
Halesia monticola rosea
Halesia monticola 'Rosemoor Form'
Halesia monticola vestita
Halmeda macroloba
x Halimiocistus sahucii
Halimium calycinum
Halimium lasianthum
Halimium lasianthum formosum
Halimium ocymoides
Halimium ocymoides 'Susan'
Haloragis erecta 'Wellington Bronze'
Hamamelis x intermedia 'Arnold Promise'
Hamamelis x intermedia 'Aurora'
Hamamelis x intermedia 'Buckland Orange'
Hamamelis x intermedia 'Diane'
Hamamelis x intermedia 'Foxy Lady'
Hamamelis x intermedia 'Glowing Embers'
Hamamelis x intermedia 'Harry'
Hamamelis x intermedia 'Jelena'
Hamamelis x intermedia 'Pallida'
Hamamelis x intermedia 'Primavera'
Hamamelis x intermedia 'Ruby Glow'
Hamamelis x intermedia 'Sunburst'
Hamamelis x intermedia 'Vesna'
Hamamelis japonica 'Sulphurea'
Hamamelis japonica 'Superba'
Hamamelis mollis
Hamamelis mollis 'Coombe Wood'
Hamamelis mollis 'Nymans'
Hamamelis mollis 'Wisley Supreme'
Hamamelis vernalis
Hamamelis vernalis 'Carnea'
Hamatocactus longihamatus
Hamelia patens
Hanguana malayana
Hardenbergia violacea
Hatiora salicornoides
Haworthia arachnoidea nigricans
Haworthia attenuata
Haworthia attenuata radula
Haworthia bolusii blackbeardiana
Haworthia cymbiformis
Haworthia emelyae major
Haworthia emelyae var picta 'Japan Clone'
Haworthia fusca
Haworthia glauca herrei
Haworthia glauca var herrei f eilyae
Haworthia herbacea
Haworthia herrei var herrei
Haworthia koelmanniorum koelmanniorum
Haworthia lapostele
Haworthia limifolia
Haworthia limifolia 'Variegated'
Haworthia mantellii
Haworthia margaritifera
Haworthia marginata
Haworthia maughanii
Haworthia mirabilis
Haworthia mirabilis var badia
Haworthia mirabilis var paradoxa
Haworthia odettae
Haworthia pygmaea var argenteomaculosa
Haworthia reinwardtii var kaffirdriftensis
Haworthia reticulata var subregularis
Haworthia retusa dekenahii
Haworthia springbokulanesiae
Haworthia truncata
Haworthia venosa granulata
Haworthia venosa tesselata
Haworthia viscosa f. subobtusa