Helianthus angustifolius Helianthus annuus
Helianthus annuus '7111' Helianthus annuus 'Big Smile'
Helianthus annuus 'Color Fashion' Helianthus annuus 'Ikarus'
Helianthus annuus 'Mammoth Russian' Helianthus annuus 'Ring of Fire'
Helianthus annuus 'Soraya' Helianthus annuus 'Sundance Kid'
Helianthus annuus 'Sunset' Helianthus annuus 'Sunspot'
Helianthus annuus 'Teddy Bear' Helianthus annuus 'Zebulon'
Helianthus debilis Helianthus debilis 'Sunspot'
Helianthus maximilianii Helianthus microcephalus
Helianthus salicifolius Helianthus salicifolius 'First Light'
Helianthus salicifolius 'Low Down' Heliopsis helianthoides
Heliopsis helianthoides 'Ballerina' Heliopsis helianthoides 'Prairie Sunset'
Heliopsis helianthoides 'Summer Sun' Heliopsis helianthoides ssp. scabra
Heliopsis helianthoides ssp. scabra 'Gold Greenheart' Heliopsis helianthoides ssp. scabra 'Golden Plume'
Helonias bullata Hepatica acutiloba
Hepatica americana Hesperaloe funifera
Hesperaloe nocturna Hesperaloe parviflora
Hesperocyparis sargentii Hesperoyucca whipplei
Heteromeles arbutifolia Heteromeles arbutifolia var. cerina 'Claremont'
Heteromeles arbutifolia var. cerina 'Yellow Berry' Heterotheca villosa
Heuchera 'Northern Fires' Heuchera 'Santa Ana Cardinal'
Heuchera americana Heuchera americana 'Eco Magnifolia'
Heuchera americana 'Pewter Veil' Heuchera americana 'Ruby Veil'
Heuchera micrantha 'Bressingham Bronze' Heuchera micrantha 'Palace Purple'
Heuchera micrantha 'Pewter Moon' Heuchera micrantha 'Raspberry Regal'
Heuchera micrantha 'Ruffles' Heuchera pulchella
Heuchera sanguinea Heuchera sanguinea 'Brandons Pink'
Heuchera sanguinea 'Chatterbox' Heuchera sanguinea 'June Bride'
Heuchera sanguinea 'Monet' Heuchera sanguinea 'Silver Veil'
Heuchera sanguinea 'Sioux Falls' Heuchera sanguinea 'Snow Angel'
Heuchera sanguinea 'Snow Storm' Heuchera sanguinea 'Spangles'
Heuchera sanguinea 'Splendens' Heuchera sanguinea 'Stormy Seas'
Heuchera sanguinea 'Windfield Pink' Heuchera villosa
Heuchera villosa 'Caramel' Heuchera villosa 'Citronelle'
Heuchera villosa 'Night Watch' Heuchera x villosa 'Carnival Watermelon'
Hexastylis virginica Hibiscus coccineus
Hibiscus moscheutos Hibiscus moscheutos 'Disco Belle Mix'
Hibiscus moscheutos 'Disco Belle Pink' Hibiscus moscheutos 'Disco Belle Red'
Hibiscus moscheutos 'Disco Belle White' Hibiscus moscheutos 'Lord Baltimore'
Hibiscus moscheutos 'Southern Belle' Hibiscus moscheutos ssp. palustris
Hippuris vulgaris Holodiscus discolor
Hordeum jubatum Houstonia caerulea
Hunnemannia fumariifolia Hunnemannia fumariifolia 'Sunlite'