Associated organism genera: Habenaria [12 taxa], Habranthus [7 taxa], Hackelochloa [2 taxa], Haemanthus [28 taxa], Haematococcus [1 taxon], Haematomma [7 taxa], Haematomyxa [2 taxa], Haematonectria [114 taxa], Haematoxylum [8 taxa], Haenianthus [3 taxa], Hagenia [3 taxa], Hainesia [2 taxa], Hakea [8 taxa], Haldina [3 taxa], Halenia [3 taxa], Haleomyces [1 taxon], Haligena [3 taxa], Halimeda [1 taxon], Halimione [2 taxa], Halimium [5 taxa], Halimodendron [6 taxa], Haliplus [1 taxon], Halleria [85 taxa], Halocarpus [1 taxon], Halocnemum [1 taxon], Halodule [2 taxa], Halophila [1 taxon], Halopteris [1 taxon], Halosphaeria [3 taxa], Haloxylon [9 taxa], Haltica [4 taxa], Hamamelis [1 taxon], Hamelia [26 taxa], Hamiltonia [4 taxa], Hancea [2 taxa], Hancornia [7 taxa], Hannoa [2 taxa], Hanseniaspora [2 taxa], Hansfordia [15 taxa], Hansfordiella [3 taxa], Hansfordiellopsis [32 taxa], Hansfordina [7 taxa], Hansfordiopeltis [13 taxa], Haplanthus [1 taxon], Haplaria [3 taxa], Haplariopsis [1 taxon], Haplopappus [2 taxa], Haplopeltheca [8 taxa], Haplophragma [1 taxon], Haplophyllum [1 taxon], Haplotrichum [8 taxa], Hardwickia [14 taxa], Harknessia [3 taxa], Harpephyllum [40 taxa], Harpochytrium [2 taxa], Harpographium [4 taxa], Harpullia [1 taxon], Harrisonia [8 taxa], Harungana [9 taxa], Hasseltia [1 taxon], Haworthia [9 taxa], Haynaldia [7 taxa], Hebe [3 taxa], Hebeclinium [5 taxa], Hebestigma [7 taxa], Hecatostemon [3 taxa], Heckeria [2 taxa], Hedera [396 taxa], Hedycarya [1 taxon], Hedychium [28 taxa], Hedyosmum [5 taxa], Hedyotis [5 taxa], Hedypnois [5 taxa], Hedysarum [30 taxa], Helarctos [1 taxon], Helenium [2 taxa], Heleocharis [2 taxa], Helianthemum [47 taxa], Helianthus [528 taxa], Helichrysum [161 taxa], Helicia [3 taxa], Helicoön [1 taxon], Helicodendron [1 taxon], Helicoma [53 taxa], Helicominopsis [55 taxa], Helicomyces [13 taxa], Heliconia [158 taxa], Helicorhoidion [9 taxa], Helicosporium [71 taxa], Helicoverpa [4 taxa], Helicteres [27 taxa], Helictotrichon [6 taxa], Helietta [2 taxa], Helikedomyces [133 taxa], Heliocarpus [11 taxa], Heliophila [9 taxa], Heliopsis [12 taxa], Heliothis [9 taxa], Heliotropium [70 taxa], Helipterum [6 taxa], Helleborus [61 taxa], Helminthia [5 taxa], Helminthophora [4 taxa], Helminthosphaeria [1 taxon], Helminthosporium [200 taxa], Helminthostachys [2 taxa], Helopeltis [1 taxon], Helopus [1 taxon], Helosciadium [1 taxon], Helosciadum [1 taxon], Helvella [4 taxa], Hemarthria [41 taxa], Hemerocallis [16 taxa], Hemianthus [1 taxon], Hemibeltrania [6 taxa], Hemiberlesia [5 taxa], Hemicorynespora [1 taxon], Hemicrambe [1 taxon], Hemidesmus [9 taxa], Hemidiodia [18 taxa], Hemigrapha [2 taxa], Hemigraphis [8 taxa], Hemigyrosa [3 taxa], Hemileia [6 taxa], Hemimycena [3 taxa], Hemiphacidium [2 taxa], Hemiptelea [1 taxon], Hemitelia [1 taxon], Hemithrinax [1 taxon], Hemitrichia [11 taxa], Hemizygia [2 taxa], Hendersonia [69 taxa], Hendersonia [27 taxa], Hendersonula [8 taxa], Henicospora [5 taxa], Henriettella [3 taxa], Henriquesia [2 taxa], Hepatica [11 taxa], Heptapleurum [9 taxa], Heptaster [12 taxa], Heracleum [276 taxa], Heritiera [13 taxa], Hermannia [1 taxon], Hermatomyces [14 taxa], Herminium [1 taxon], Hernandia [8 taxa], Herniaria [34 taxa], Herpestis [2 taxa], Herpotrichia [1 taxon], Herpotrichiella [1 taxon], Hertia [1 taxon], Hesperethusa [1 taxon], Hesperis [34 taxa], Hesperomeles [1 taxon], Heterobasidion [2 taxa], Heterocaryum [1 taxon], Heterocerus [1 taxon], Heteroconium [5 taxa], Heterodera [65 taxa], Heterodermia [22 taxa], Heteromeles [1 taxon], Heteromorpha [39 taxa], Heteronychus [5 taxa], Heterophragma [19 taxa], Heteropogon [232 taxa], Heteropsis [19 taxa], Heteropsylla [3 taxa], Heteropterys [17 taxa], Heteropyxis [15 taxa], Heterosporium [1 taxon], Heterostemma [3 taxa], Heterotrichum [45 taxa], Heuchera [1 taxon], Hevea [232 taxa], Hewittia [30 taxa], Hexagona [1 taxon], Hexagonia [2 taxa], Hexalobium [1 taxon], Heyderia [2 taxa], Heylandia [2 taxa], Heynea [3 taxa], Hibiscus [876 taxa], Hicoria [2 taxa], Hieracium [196 taxa], Hierochloë [23 taxa], Hilaria [1 taxon], Hilleria [4 taxa], Hillia [7 taxa], Hiospira [105 taxa], Hippeastrum [25 taxa], Hippobroma [7 taxa], Hippobromus [64 taxa], Hippocratea [76 taxa], Hippocrepis [8 taxa], Hippomane [13 taxa], Hippomarathrum [3 taxa], Hippophaë [112 taxa], Hippopotamus [4 taxa], Hippotragus [1 taxon], Hippuris [2 taxa], Hiptage [10 taxa], Hiraea [4 taxa], Hirschfeldia [2 taxa], Hirsutella [3 taxa], Hirtella [17 taxa], Hitchenia [1 taxon], Hobsonia [9 taxa], Hoffmannia [2 taxa], Hohenbergia [1 taxon], Hoheria [2 taxa], Holarrhena [33 taxa], Holboellia [1 taxon], Holcus [46 taxa], Holigarna [7 taxa], Holmskioldia [7 taxa], Holocalyx [1 taxon], Holoptelea [10 taxa], Holosteum [4 taxa], Holotrichia [3 taxa], Holubovaea [44 taxa], Homalanthus [1 taxon], Homalium [18 taxa], Homalota [2 taxa], Homalothecium [2 taxa], Homeria [21 taxa], Homo [827 taxa], Homogyne [2 taxa], Homoianthus [4 taxa], Homolepis [2 taxa], Homonoia [9 taxa], Homostegia [4 taxa], Hoodia [2 taxa], Hopea [14 taxa], Hoplocerambyx [1 taxon], Hordeum [1370 taxa], Hormisciella [13 taxa], Hormisciomyces [99 taxa], Hormiscium [1 taxon], Hornungia [3 taxa], Horsfieldia [1 taxon], Hoslundia [13 taxa], Hosta [3 taxa], Houttuynia [1 taxon], Hovea [1 taxon], Hovenia [5 taxa], Howardia [1 taxon], Howeia [5 taxa], Hoya [17 taxa], Huernia [2 taxa], Hugeria [1 taxon], Hugonia [6 taxa], Humaria [9 taxa], Humarina [2 taxa], Humboldtia [1 taxon], Humicola [2 taxa], Humulus [212 taxa], Hura [67 taxa], Huso [3 taxa], Hyacinthella [3 taxa], Hyacinthoides [2 taxa], Hyacinthus [12 taxa], Hyaena [4 taxa], Hyalinia [1 taxon], Hyalocapnias [10 taxa], Hyalocrea [8 taxa], Hyalodendron [8 taxa], Hyaloderma [3 taxa], Hyalopsora [2 taxa], Hyaloscolecostroma [5 taxa], Hyaloscypha [7 taxa], Hyalosphaera [4 taxa], Hybanthus [2 taxa], Hydnocarpus [4 taxa], Hydnum [2 taxa], Hydrangea [77 taxa], Hydrilla [4 taxa], Hydrochoerus [10 taxa], Hydrocotyle [104 taxa], Hydrolea [3 taxa], Hydrophyllum [2 taxa], Hydropus [20 taxa], Hygrocybe [5 taxa], Hygrophila [14 taxa], Hygrophoropsis [2 taxa], Hygrophorus [2 taxa], Hylastes [4 taxa], Hylecoetus [17 taxa], Hylocereus [1 taxon], Hylomecon [2 taxa], Hylurgops [3 taxa], Hymenachne [8 taxa], Hymenaea [119 taxa], Hymenelia [2 taxa], Hymenella [6 taxa], Hymeniopeltis [35 taxa], Hymenobiella [1 taxon], Hymenocallis [34 taxa], Hymenocardia [10 taxa], Hymenochaete [12 taxa], Hymenodictyon [4 taxa], Hymenogloea [2 taxa], Hymenophyllum [3 taxa], Hymenopsis [1 taxon], Hymenoscyphus [19 taxa], Hymenostephium [1 taxon], Hyophorbe [1 taxon], Hyoscyamus [115 taxa], Hyoseris [2 taxa], Hyparrhenia [503 taxa], Hypelate [5 taxa], Hypera [2 taxa], Hyperbaena [13 taxa], Hypericum [291 taxa], Hyphaene [3 taxa], Hypnea [1 taxon], Hypnum [9 taxa], Hypocala [2 taxa], Hypocenomyce [3 taxa], Hypochaeris [6 taxa], Hypochoeris [17 taxa], Hypocrea [27 taxa], Hypocrella [44 taxa], Hypoderma [3 taxa], Hypoestes [63 taxa], Hypogomphia [2 taxa], Hypogymnia [48 taxa], Hypolepis [3 taxa], Hypomyces [234 taxa], Hypophthalmichthys [1 taxon], Hypopitys [1 taxon], Hypothenemus [16 taxa], Hypotrachyna [5 taxa], Hypoxis [78 taxa], Hypoxylon [63 taxa], Hypsela [1 taxon], Hypselodelphys [1 taxon], Hypsipyla [1 taxon], Hyptis [285 taxa], Hyssopus [18 taxa], Hysterium [1 taxon], Hysterographium [1 taxon], Hysterostegiella [3 taxa], Hysterostoma [1 taxon], Hysterostomella [1 taxon], Hystrichopsylla [4 taxa], Hystrix [1 taxon], Hytocereus [1 taxon]