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
- Hardenbergia
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 nepalensis
- Hedera pastuchovii
- Hedera sinensis
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
- Hertia
- Hesperaloe
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 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
Hesperoyucca
- Hesperoyucca whipplei Our Lord's Candle
- Heteromorpha
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
- Humulus
Hydrangea
- Hydrangea ampla
Hydrangea anomala Climbing Hydrangea
- Hydrangea arborescens Smooth Hydrangea, Sevenbark
- Hydrangea aspera
Hydrangea aspera Species Complex Cultivars
- 'Anthony Bullivant'
- 'August Abundance'
- 'Aurelie'
- 'Bellevue'
- 'Blue Skies'
- 'Elegant Sound Pavilion'
- 'Farall'
- 'Formosa'
- 'Giel'
- 'Golden Needle'
- 'Goldilocks'
- 'Gongshan'
- 'Hpopr012'
- 'Koki'
- 'La Fosse'
- 'Macrophylla'
- 'Mauvette'
- 'Monpulsel'
- 'Peter Chappell'
- 'Pink Cloud'
- 'Rocklon'
- 'Rosemary Foster'
- 'Sam MacDonald'
- 'Sapa'
- 'Sealing Wax'
- 'September Splendour'
- 'Spinners'
- 'Taiwan'
- 'The Ditch'
- 'Titania'
- 'Trelissick'
- 'Velvet and Lace'
- 'Windcliffay'
Hydrangea barbara Climbing Hydrangea, Woodvamp
- Hydrangea bretschneideri
- Hydrangea cinerea Ashy Hydrangea
- Hydrangea daimingshanensis
- Hydrangea davidii
- Hydrangea glaucescens
- Hydrangea heteromalla
- Hydrangea hirsuta
- Hydrangea hirta Nettle-leaved Hydrangea, Ko-ajisai
- Hydrangea hwangii
- Hydrangea indochinensis
- Hydrangea integrifolia
- Hydrangea kawakamii
- Hydrangea kwangsiensis
- Hydrangea liukiuensis
- Hydrangea lobbii
- Hydrangea longifolia chang ye xiu qiu
- Hydrangea macrophylla Bigleaf Hydrangea
- Hydrangea obtusifolia
Hydrangea paniculata Panicle Hydrangea
- f. velutina Birōdo-nori-utsugi
- Hydrangea pottingeri
Hydrangea quercifolia Oakleaf Hydrangea, Oak-leaved Hydrangea
- Hydrangea radiata Silverleaf Hydrangea, Snowy Hydrangea
- Hydrangea robusta
- Hydrangea sargentiana
- Hydrangea scandens
- Hydrangea schizomollis
Hydrangea Section Macrophyllae Cultivars B
- 'Bachstelze'
- 'Bailday'
- 'Bailmacfive'
- 'Bailmer'
- 'Beauté Vendomoise'
- 'Beni-gaku'
- 'Beni-temari'
- 'Beni-yama'
- 'Besshi-temari'
- 'Big Daddy'
- Black Diamonds Series
- Black Steel Series
- 'Blauer Prinz'
- 'Bläuling'
- 'Blaumeise'
- BloomChampion Series
- 'Blue Billow'
- 'Blue Cassell'
- 'Blue Deckle'
- 'Bluebird'
- 'Blushing Bride'
- 'Bodalan'
- 'Bodensee'
- 'Bouquet Rose'
- 'Brügg'
- 'Buchfink'
Hydrangea Section Macrophyllae Cultivars H
- 'H2002'
- 'H21-3'
- 'H211905'
- 'Hakucho'
- 'Hakusen'
- 'Hamburg'
- 'Harbits'
- 'Harry's Red'
- 'Hatfield Rose'
- 'Hatsushimo'
- 'Hba202911'
- 'Heinrich Seidel'
- 'Hmopico04–0'
- 'Hmupsi'
- 'Hobella'
- 'Hobergine'
- 'Hokomarevo'
- 'Holstein'
- 'Hopcorn'
- 'Hore0007'
- 'Hore0046'
- 'Horheart'
- 'Hörnli'
- 'Hortfire'
- 'Hortmacodre'
- 'Hortmahar'
- 'Hortmani'
- 'Hortmarhaso'
- 'Hortmawin'
- 'Horwack'
- Hovaria® Series
- 'Hsopr015'
- 'Hymmad I'
- 'Hymmad II'
- 'Hymmad III'
Hydrangea Section Macrophyllae Cultivars M
- 'Maculata'
- 'Madame A. Riverain'
- 'Madame Émile Mouillère'
- 'Madame Faustin Travouillon'
- 'Madame Plumecocq'
- Magical Series
- 'Maiko'
- 'Mak2'
- 'Mak20'
- 'Makd'
- 'Maréchal Foch'
- 'Mariesii'
- 'Mariesii Grandiflora'
- 'Mariesii Lilacina'
- 'Mariesii Perfecta'
- 'Mathilde Gütges'
- 'Merritt's Supreme'
- 'Merveille Sanguine'
- 'Mikanba-gaku'
- 'Mikata-yae'
- 'Mikawa-chidori'
- 'Mini Penny'
- 'Mirai'
- 'Miranda'
- 'Miss Belgium'
- 'Miyama-yae-murasaki'
- 'Monmar'
- 'Montgomery'
- 'Mousmé'
- 'Mousseline'
- 'Möwe'
- 'Mrs W.J. Hepburn'
- Music Collection
Hydrangea Section Macrophyllae Cultivars S
- 'Sabrina'
- 'Sadie Ray'
- 'Sandra'
- Saxon® Series
- 'Schneeball'
- 'Schöne Bautznerin'
- 'Seafoam'
- Seaside Serenade® Series
- Seduction® Series
- 'Selina'
- 'Shakira'
- 'Shamrock'
- 'Shichidanka'
- 'Shinonome'
- 'Shiro-fuji'
- 'Shiro-maiko'
- 'Shirotae'
- 'Shōjō'
- 'Sibilla'
- 'Smnhsdd'
- 'SMNHSI'
- So Long® Series
- 'Sonmarie'
- 'Souvenir du Président Paul Doumer'
- 'sPg-3-009'
- 'Spike'
- Sturdy Series
- 'Sumida-no-hanabi'
- Hydrangea serrata
- Hydrangea serratifolia Canalilla
- Hydrangea sikokiana
Hydrangea species of Section Cornidia
- 1: The Temperate Outliers
2: Subtropical & Tropical Species
- Hydrangea albostellata
- Hydrangea asterolasia
- Hydrangea breedlovei
- Hydrangea carroniae
- Hydrangea diplostemona
- Hydrangea jelskii
- Hydrangea mathewsii
- Hydrangea nahaensis
- Hydrangea nebulicola
- Hydrangea oerstedii
- Hydrangea otontepecensis
- Hydrangea peruviana
- Hydrangea preslii
- Hydrangea sousae
- Hydrangea steyermarkii
- Hydrangea tapalapensis
- Hydrangea tarapotensis
- Hydrangea strigosa
- Hydrangea stylosa
- Hydrangea tomentella
- Hydrangea viburnoides
- Hydrangea villosa
- Hydrangea xanthoneura
- Hydrangea × ytiensis
- Hylotelephium
Hymenosporum
- Hymenosporum flavum Australian Native Frangipani, Sweetshade
Hypericum
- Hypericum acmosepalum
- Hypericum addingtonii
- Hypericum aegypticum
- Hypericum androsaemum Tutsan
- Hypericum augustinei
- Hypericum balearicum
- Hypericum bellum
- Hypericum buckleyi
- Hypericum calycinum Rose of Sharon, Aaron's Beard
- Hypericum cerastoides
- Hypericum choisyanum
- 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 St Andrew's Cross
- Hypericum × inodorum
- Hypericum kouytchense
- Hypericum leschenaultii
- Hypericum lobbii
- Hypericum maclarenii
- Hypericum monogynum
- Hypericum nudiflorum
- Hypericum olympicum
- Hypericum patulum
- Hypericum prolificum
- Hypericum reptans
- Hypericum revolutum
- Hypericum stellatum
- Hypericum subsessile
- Hypericum wilsonii
- Hypericum xylosteifolium