Plant Index
Hagenia
- Hagenia abyssinica African Redwood, Kosso
Halesia Silverbells
Halesia carolina Carolina Silverbells, Carolina Silverbells, Florida Silverbells, Little Silverbells, Mountain Silverbells, Opossum-wood, Shittim-wood, Snowdrop tree
Halesia diptera Two-winged silverbell, Snowdrop tree
Halleria
- Halleria lucida African Honeysuckle, Tree Fuchsia
Hamamelis Witch-Hazel
Hamamelis japonica Japanese Witch-Hazel
- Hamamelis mollis Chinese Witch-Hazel
- Hamamelis virginiana Virginian Witch-Hazel
- Harrimanella
Hedera Ivy
Hedera helix Common Ivy
- 'Adam'
- 'Atropurpurea'
- 'Buttercup'
- 'Cavendishii'
- 'Conglomerata'
- 'Conglomerata Erecta'
- 'Deltoidea'
- 'Digitata'
- 'Donerailensis'
- f. poetarum Poet's Ivy
- 'Glacier'
- 'Glymii'
- 'Goldheart'
- 'Gracilis'
- 'Green Ripple'
- 'Helford River'
- 'Hibernica' Irish Ivy
- 'Hibernica Aurea'
- 'Hibernica Maculata'
- 'Lobata Major'
- 'Marginata Elegantissima'
- 'Marginata Robusta'
- 'Marmorata Minor'
- 'Minima'
- 'Ovata'
- 'Palmata'
- 'Pedata' Bird's Foot Ivy
- 'Russell Gold'
- 'Sagittifolia'
- 'Sheen Silver'
- 'Spectabilis Aurea'
- var. taurica
- Hedera pastuchovii
Hedycarya
- Hedycarya arborea Pigeonwood, Poraikaiwihiri
Helianthemum Sun Rose
- Helianthemum canum
- Helianthemum croceum
- Helianthemum lunulatum
Helianthemum oelandicum
- 'Afflick'
- 'Alice Howorth'
- 'Ben Attow'
- 'Ben Avon'
- 'Ben Fhada'
- 'Ben Hope'
- 'Ben Ledi'
- 'Ben Lui'
- 'Ben More'
- 'Ben Nevis'
- 'Ben Venue'
- 'Bengal Rose'
- 'Cerise Queen'
- 'Fire Dragon'
- 'Fireball'
- 'Henfield Brilliant'
- 'Jubilee'
- 'Mrs C W Earle'
- 'Mrs Clay'
- 'Rhodanthe Carneum'
- 'St John's College Yellow'
- 'Sudbury Gem'
- 'The Bride'
- 'Tigrinum Plenum'
- 'Watergate Rose'
- 'Wisley Pink'
- 'Wisley Primrose'
Heptacodium
- Heptacodium miconioides Seven-son Flower
Hesperocyparis
- Hesperocyparis arizonica Arizona Cypress
- Hesperocyparis bakeri Baker Cypress, Modoc Cypress, Siskiyou Cypress
- Hesperocyparis benthamii
- Hesperocyparis forbesii Tecate Cypress
- Hesperocyparis glabra
Hesperocyparis goveniana
- var. abramsiana Santa Cruz Cypress
- Hesperocyparis guadalupensis
- Hesperocyparis macnabiana
Hesperocyparis macrocarpa Monterey Cypress
- Hesperocyparis pygmaea
- Hesperocyparis sargentii Sargent Cypress
- Hesperocyparis stephensonii
× Hesperotropsis Hybrid Cypresses
× Hesperotropsis leylandii Leyland Cypress, Leylandii
- × Hesperotropsis notabilis Alice Holt Cypress, Noble Cypress
- × Hesperotropsis ovensii Ovens' Cypress
Hibbertia Guinea Flower
- Hibbertia aspera
- Hibbertia scandens Gold Guinea Plant
Hippocrepis
Hippocrepis emerus Scorpion Senna
Hoheria Lacebark, Ribbonwood
- Hoheria 'Ace of Spades'
- Hoheria angustifolia Narrow-leaved Lacebark, Narrow-leaved Houhere
- Hoheria 'Borde Hill'
- Hoheria glabrata Mountain Lacebark
- Hoheria 'Glory of Amlwch'
- Hoheria 'Hutwhit'
Hoheria lyallii Mountain Ribbonwood
Hoheria populnea Lacebark, Houhere, Ribbonwood
Hoheria sexstylosa Lacebark, Houhere, Long-leaved Lacebark, Graceful Lacebark, Houhiongaonga
- Hoheria 'Stardust'
Holodiscus
- Holodiscus discolor Oceanspray, Ironwood, Creambush
Hovenia Raisin Trees
- Hovenia acerba Chinese Raisin Tree
- Hovenia dulcis Japanese Raisin Tree
- Hovenia pubescens
- Hovenia tomentella
Hudsonia
Hudsonia ericoides False Heather
- [Hudsonia ericoides] H tomentosa Beach Heather
Hydrangea
- Hydrangea anomala
- Hydrangea aspera
- Hydrangea longipes
Hydrangea macrophylla
- 'Altona'
- 'Amethyst'
- 'Ami Pasquier'
- 'Ayesha'
- 'Blue Wave'
- 'Bouquet Rose'
- 'Domotoi'
- 'Europa'
- 'Fisher's Silverblue'
- 'Frillibet'
- 'Generale Vicomtesse de Vibraye' ('Vibraye')
- 'Gentian Dome' ('Enziandom')
- 'Kluis Superba'
- 'Lanarth White'
- 'Lilacina'
- 'Maréchal Foch'
- 'Mariesii'
- 'Miss Belgium'
- 'Mme A Riverain'
- 'Mme E Mouillère'
- 'Niedersachsen'
- 'Nigra' ('Mandshurica')
- 'Otaksa'
- 'Parsifal'
- 'Pia'
- 'Princess Beatrix'
- 'Quadricolor'
- 'Rosea'
- var. normalis
- 'Veitchii'
- 'Violetta'
- 'Westfalen'
- 'White Wave'
- Hydrangea paniculata
- Hydrangea petiolaris
- Hydrangea platyarguta
- Hydrangea quercifolia Oak-leaved Hydrangea
- Hydrangea sargentiana
- Hydrangea scandens
- Hydrangea serratifolia
Hymenosporum
- Hymenosporum flavum Australian Native Frangipani, Sweetshade
Hypericum
- Hypericum acmosepalum
- Hypericum addingtonii
- Hypericum aegypticum
- Hypericum androsaemum Tutsan
- Hypericum augustinii
- Hypericum balearicum
- Hypericum bellum
- Hypericum buckleyi
- Hypericum calycinum Rose of Sharon, Aaron's Beard
- Hypericum cerastoides
- Hypericum chinense
- Hypericum choisianum
- Hypericum cordifolium
- Hypericum coris
- Hypericum × cyathiflorum
- Hypericum densiflorum
- Hypericum 'Eastleigh Gold'
- Hypericum ericoides
- Hypericum forrestii
- Hypericum frondosum
- Hypericum galioides
- Hypericum grandifolium
- Hypericum 'Hidcote'
- Hypericum hypericoides
- Hypericum × inodorum
- Hypericum kouytchense
- Hypericum leschenaultii
- Hypericum lobbii
- Hypericum monogynum
- Hypericum × moserianum
- Hypericum nudiflorum
- Hypericum olympicum
- Hypericum patulum
- Hypericum prolificum
- Hypericum reptans
- Hypericum revolutum
- Hypericum stellatum
- Hypericum subsessile
- Hypericum wilsonii
- Hypericum xylosteifolium
Hyssopus
- Hyssopus officinalis Hyssop