H letter

Haageocereus icosagonus
Habenaria chlorantha crinifera, , rhodocheila, rhodopensis,
Haberlea Ferdinandi-Cobourghii, myrsinoides, rhodopensis
Habranthus tubispathum
Hadrodemas Warschewiczianum
Haemanthus albiflos, coccineus, Katherinae, magnificus,
Hakea laurina, leucoptera, pugioniformis, teretifolia
Hakonekilloa macra macra aureola
Halimiocistus hyb Revolii, Wintoniensis “Merrist wood cream”
Halimium lasianthum formosum, lasianthum, libanotis, ocymoides, halimifolium, scabrosum, serrulatum,
Halleria lucida
Hamamelis Xintermedia,  e “Carmine red”,  mollis, japonica  var. rubra, pallida,
Hamatocactus hamatacanthus
Hamelia coccinea, pallens,
Haplocarpha Roeppellinii
Haplopappus Brandegei
Haquetia Epipactis e variegata,
Hardenbergia Comptoniana, monophylla, violacea,
Hatiora “Evita” (vedi Rhypsalydopsis)
Hawortia fasciata
Hebe albicans e var. “Snow cover”, Armstrongii, brachysiphon, carnosula, cupressoides, diosmiflora, macrocarpa, pinguifolia, Pollonsii, rocajensis, speciosa, ed ibridi “Lady harmony” “Pointed finger” (vedi Veronica)
Hebenstreitia integrifolia
Hechtia argentea, glomerata
Hedera algeriensis “Gloire de Marocco”, canariensis, colchica dentata variegata, helix e var. glomerata,  “Bill Archer” “Eva” ed Ederine varietà, rhombea, 
Hedychium coronarium Gardnerianum, Raffilii
Hedysarum coronarium, hedysaroides, obscurum
Heimia salicifolia
Helenium autumnalis, Bigelowii, Hoopesii, tenuifolium ed ibridi
Heliamphora nutans
Helianthella quinquinervis
Helianthemum apenninum, canum, chamaecistus, croceum, grandiflorum, lavandulaefolium, leptophyllum, nummularium, oelandicum, ovatum, piloselloides, polifolium, rhodanthe carneum, salicifolium, thymifolium ed ibridi “The bride”, “Highwood apricot” “Mrs. C.W.Earle”,
Helianthocereus Huascha
Helianthus annuus “Orange sun” “Sun spot”, decapetalus, helianthoides, tuberosus
Helichrisum albo-bruneum, balearicum, bellidioides, bracteatum, confertum, croceum, dealbatum, Ecklonis, frigidum, Heidrechii, italicum, marginatum, MMilforidgerianum, o orientale, petiolatus, retortum, rupestre, saxatile, scorpioides, sibyricum, retortum, rosmarinifolium “Scwefellight”, splendidum, stoechas, Subthorpii, thiamschanicum, trilineatum, virgineum e var. “supreme”
Heliconia atrata, Bihai, caribea, Collinsiae, humilis, latispatha, major, pendula, psittaccina, rostrata,
Helikhtrochilon sempervirens
Helionopsis orientale
Heliophila coronopifolia
Heliopsis helianthoides “Wuster Koenig” “Light of Loddon” “Bouzingold”, scabra e var. “Sommer sun” “Sonnen strahl”, ibridi diversi
Heliosperma alpestre (vedi Silene)
Heliotropium anchusifolium, arboreum, europaeum, peruvianum  e var. “Princess Marina”, repens
Helipterum Humboldtianum, Manglesii, roseum, “Bunny” (vedi Acroclinium)
Helleborus argutifolius, corsicus, cyclophyllus, foetidus, multifidus, niger, orientalis e var. “White swan”, XSternii, torquatus,   trifolius, viridis X intermedius, “Hollywell purple”
Helxine Soleirolii (vedi Soleirolia)
Hemerocallis aurantiaca, citrina, flava, Forrestii, fulva e var. “Sugar candy””Perennial pleasure””Golden chimes“, minor, 
Hepatica nobilis, triloba, (vedi Anemone)
Herachleum gummiferum, Lehmannianum, Mantegazzianum, sphondylium,
Herbertia jahue
Hereoa tugwellae
Heretia Dicksonii
Hermannia denudata
Hesperantha Burii
Hesperis inodora, matronalis, subsinuata,
Heterolepis aliena
Heteromeles arbutifolia, serrulata, (vedi Photinia)
Heteromorpha arborescens, trifoliata
Heuchera cylindrica e var. “Hyperion”, micrantha, sanguinea e var. cylindrica e “Rachel” “Plum Pappy” Purple palace”,  Xtiarelloides,
Heucherella alba “Rosalie”
Hevea brasiliensis
Heywoodiella oligocephala
Hibbertia scandens, tetrandra, volubilis
Hibiscus Abelmoschus, caliphyllus, Clayii, coccineus, conspicuus, diversifolius, Hueghelii, militaris, Moscheutos, Moesiana, mutabilis, palustris, pedunculatus, radiatus, rosa-sinensis e var. Cooperii, schyzopetalus e schyzopetalus e var. “pagoda”, Xrosa sinensis, splendens, syriacus, versicolor, varietà diverse (vedi Abelmoschus)
Hidalgoa ternata
Hieracium aurantiacum, cymosum, cynoglossoides, crinitum, glaucum, lanatum, lanceolatum, maculatum, murorum, pulmonarioides, pyrenaicum, racemosum, rupestre,  Scoulerii, umbellatum, villosum
Himanthoglossum hircinum, longibracteatum
Hippeastrum vittatum
Hippobroma longiflora
Hippophae rhamnoides,
Hippuris vulgaris
Hoffmannia ghieselbrechtii e var. variegata, refulgens
Hohenbergia Ridley, stellata,  (vedi Aechmea)
Hoheria glabrata “Glory of Amlwl”, Lyallii
Holcus mollis variegatus
Holmskioldia lutea, sanguinea, sanguinea e var. purpurata,
Homalanthus Leschenaultianus, populifolineus
Homalocephala texensis
Homalomena rubescens
Homeria collina, flaccida
Homoglossum revolutum, Watsonianum (vedi Antholyza, Gladiolus)
Homogyne alpina
Homoianthus multiflorus (vedi Perezia)
Honklenia peploides
Hoodia Bainii,
Hordeum jubatum
Horminum pyrenaicum
Horphium frutescens
Hosta albomarginata, Fortunei e aureomarginata e albopicta, lancifolia e var. tardiflora, longipes, minor, ovata, plantaginea, rectifolia e var. “Tall boy”, Sieboldiana e var. elegans e “Frances Williams” e variegata, tardiflora “Alcyon”, ventricosa aureomarginata, venusta, “Golden tiara” (vedi Funkia)
Howea Forsteriana, (vedi Kentia)
Hoya bella, carnosa, compacta, parasitica, pendula, skimmiensis
Huguenimia tanacetifolia
Humea elegans
Humulus lupulus e var. aureus
Hunnenmania fumarieefolia
Hura crepitans
Hutchinsia alpina
Huttoynia cordata e variegata
Hyacinthus ametisthynus, orientalis, romanus (vedi Bellevallia) e diversi Ibridi e “Ametyst” ”Blue Jacket” “Blue giant” “Carnegie” “City of Harlem” “Delft bleu” “Fondant” “Innocente” “Jean Bos” “La Victoire” “Lady Derby” “Lord Balfour” “Orange boven” “Orange qeen” “Ostara” “Pink pearl”
Hydrangea arborescens e var. grandiflora, macrophylla var hortensis e “Taube” “Pink” “Libelle” “Blue wawe” , Mariesii, quercifolia e var. “Snow flake”, paniculata, petiolaris, Weitchii,
Hydrocleys nymphoidea
Hydrophyllum virginiana
Hydrothrida indiana
Hymenaea Courbaril
Hymenocallis caribea, expansa, festalis, Harrisiana, (vedi Ismene)
Hyosciamus albus, niger
Hypericum acmosepalum, aegypticum, androsaemum, Ascyron, bellum, calycinum, canariensis, cerastioides, chinense, Coris, elatum, empetrifolium, floribundum, fragile, hircinum, maculatum, montanum, olympicum, quadrangulum, perforatum, poliphyllum, pyramidatum, repens, rhodophaeum, Richeri, scabrum,
Hypocyrta glabra, nummularia, radicans, strigillosa,
Hypoestes aristatus, Confettii, Forkayei, phyllostachya, sanguinolenta,
Hypoxis angustifolia, argyroneura, oligotricha, Rooperii,
Hyppeastrum vittatum “red lion” e “White hazzler”
Hypsela lonfìgiflora,.reniformis,
Hyssopus ambiguus, officinalis