 | Botanical: Hakea eriantha Common: Tree Hakea Family: Proteaceae |
 | Botanical: Hakea macraeana Common: Family: Proteaceae |
 | Botanical: Hakea ochroptera Common: Dorrigo Hakea Family: Proteaceae |
 | Botanical: Hakea salicifolia ssp. salicifolia Common: Willow-leaved Hakea Family: Proteaceae |
 | Botanical: Halfordia kendack Common: Saffron-heart, Southern Ghittoe Family: Rutaceae |
 | Botanical: Harnieria hygrophiloides Common: White Karambal Family: Acanthaceae |
 | Botanical: Harpullia alata Common: Winged Tulip Family: Sapindaceae |
 | Botanical: Harpullia hillii Common: Blunt-leaved Tulip Family: Sapindaceae |
 | Botanical: Harpullia pendula Common: Tulipwood Family: Sapindaceae |
 | Botanical: Hedera helix Common: English Ivy Family: Araliaceae |
 | Botanical: Hedraianthera porphyropetala Common: Hedraianthera Family: Celastraceae |
 | Botanical: Hedycarya angustifolia Common: Native Mulberry Family: Monimiaceae |
 | Botanical: Hedychium gardnerianum Common: Ginger Lily Family: Zingiberaceae |
 | Botanical: Helichrysum sp. Mt Merino Common: Mt Merino Daisy Family: Asteraceae |
 | Botanical: Helicia ferruginea Common: Rusty Helicia Family: Proteaceae |
 | Botanical: Helicia glabriflora Common: Smooth Helicia Family: Proteaceae |
 | Botanical: Helicia nortoniana Common: Norton's Oak Family: Proteaceae |
 | Botanical: Helmholtzia glaberrima Common: Stream Lily Family: Philydraceae |
 | Botanical: Hibbertia dentata Common: Trailing Guinea Flower Family: Dilleniaceae |
 | Botanical: Hibbertia hexandra Common: Tall Hibbertia Family: |
 | Botanical: Hibbertia scandens Common: Twining Guinea Flower Family: Dilleniaceae |
 | Botanical: Hibiscus heterophyllus Common: Native Rosella Family: Malvaceae |
 | Botanical: Hibiscus insularis Common: Philip Island Hibiscus Family: Malvaceae |
 | Botanical: Hibiscus splendens Common: Pink Hibiscus Family: Malvaceae |
 | Botanical: Hibiscus tiliaceus Common: Coast Hibiscus, Coast Cottonwood Family: Malvaceae |
 | Botanical: Hicksbeachia pinnatifolia Common: Red Bopple Nut Family: Proteaceae |
 | Botanical: Hippocratea barbata Common: Knot Vine Family: Celastraceae |
 | Botanical: Hodgkinsonia ovatiflora Common: Hodgkinsonia Family: Rubiaceae |
 | Botanical: Homalanthus populifolius Common: Bleeding Heart Family: Euphorbiaceae |
 | Botanical: Homalium alnifolium Common: Homalium Family: Salicaceae / Flacourtiaceae |
 | Botanical: Hovea acutifolia Common: Purple Pea Bush Family: Fabaceae |
 | Botanical: Hovea lanceolata Common: Family: Fabaceae |
 | Botanical: Hovea longipes Common: Brush Hovea Family: Fabaceae |
 | Botanical: Howittia trilocularis Common: Blue Howittia Family: Malvaceae |
 | Botanical: Hoya australis ssp. australis Common: Native Hoya Family: Apocynaceae |
 | Botanical: Hymenanthera dentata Common: Tree Violet Family: Violaceae |
 | Botanical: Hymenosporum flavum Common: Native Frangipani Family: Pittosporaceae |
 | Botanical: Hypoestes floribunda var. pubescens Common: Hypoestes Family: Acanthaceae |
 | Botanical: Hypserpa decumbens Common: Hypserpa Family: Menispermaceae |