Hardenbergia violacea Hardenbergia violacea 'Happy Wanderer'
Hatiora gaertneri Haworthia cymbiformis ssp. setulifera
Haworthia fasciata Haworthia limifolia var. keithii
Haworthia reinwardtii var. reinwardtii Haworthia spp.
Hechtia stenopetala Hedychium x 'Daniel Weeks'
Hedychium x 'Elizabeth' Hedychium x 'Gold Flame'
Hedychium x 'Kewense' Hedychium x 'Kinkaku'
Hedychium x 'Lemon Beauty' Hedychium x 'Luna Moth'
Hedychium x 'Pink Flame' Hedychium x 'Pink V'
Hedychium x 'White Starburst' Hedychium chrysoleucum
Hedychium coccineum Hedychium coccineum 'Aurantiacum'
Hedychium coronarium Hedychium cylindricum
Hedychium flavescens Hedychium gardnerianum
Hedychium greeni Hedychium hasseltii
Helenium 'Bruno' Helenium 'Coppelia'
Helenium 'Mardi Gras' Helenium 'Moerheim Beauty'
Helenium autumnale Helenium hoopesii
Helenium puberulum Helianthus angustifolius
Helianthus angustifolius 'Gold Lace' Helianthus annuus
Helianthus annuus '7111' Helianthus annuus 'Bashful'
Helianthus annuus 'Big Smile' Helianthus annuus 'Color Fashion'
Helianthus annuus 'Florenza' Helianthus annuus 'Golden Cheer'
Helianthus annuus 'Ikarus' Helianthus annuus 'Lemon Aura'
Helianthus annuus 'Lemon Queen' Helianthus annuus 'Mammoth Russian'
Helianthus annuus 'Ring of Fire' Helianthus annuus 'Soraya'
Helianthus annuus 'Starbust Lemon Aura' Helianthus annuus 'Sundance Kid'
Helianthus annuus 'Sunset' Helianthus annuus 'Sunspot'
Helianthus annuus 'Teddy Bear' Helianthus annuus 'Zebulon'
Helianthus debilis Helianthus debilis 'Sunspot'
Helianthus giganteus 'Shiela's Sunshine' Helianthus maximilianii
Helianthus microcephalus Helianthus x multiflorus
Helianthus salicifolius Helianthus salicifolius 'First Light'
Helianthus salicifolius 'Low Down' Helianthus tuberosus
Helichrysum 'Ruby Cluster' Helichrysum 'Silver Star'
Helichrysum bracteatum 'Bright Bikinis' Helichrysum bracteatum 'Florabella Lemon'
Helichrysum bracteatum 'Gold Bikini' Helichrysum cymosum ssp. cymosum
Helichrysum italicum Helichrysum italicum 'Nana'
Helichrysum italicum ssp. serotinum Helichrysum montanum
Helichrysum petiolare Helichrysum petiolare 'Limelight'
Helichrysum petiolare 'Schweffellight' Helichrysum petiolare 'Variegatum'
Heliconia densiflora 'Fire Flash' Heliconia guyana
Heliconia orthotricha Helictotrichon sempervirens
Helictotrichon sempervirens 'Sapphire' Heliopsis helianthoides
Heliopsis helianthoides 'Ballerina' Heliopsis helianthoides 'Bressingham Doubloon'
Heliopsis helianthoides 'Loraine Sunshine' Heliopsis helianthoides 'Prairie Sunset'
Heliopsis helianthoides 'Summer Nights' Heliopsis helianthoides 'Summer Sun'
Heliopsis helianthoides ssp. scabra Heliopsis helianthoides ssp. scabra 'Gold Greenheart'
Heliopsis helianthoides ssp. scabra 'Golden Plume' Heliotropium amplexicaule
Heliotropium angiospermum Heliotropium arborescens
Heliotropium arborescens 'Atlantis' Heliotropium arborescens 'Marine'