'Harlequin' Bigleaf Hydrangea 'Harlequin' Common Honeysuckle
Harlequin Glory Bower 'Harlequin' Japanese Barberry
Harlequin Maple (spp.) Harlequin Maple 'Alberta Park'
Harlequin Maple 'Almira' Harlequin Maple 'Charles F. Irish'
Harlequin Maple 'Cleveland' Harlequin Maple 'Columnare'
Harlequin Maple 'Crimson King' Harlequin Maple 'Crimson Sentry'
Harlequin Maple 'Drummondii' Harlequin Maple 'Easy Street™'
Harlequin Maple 'Emerald Lustre™' Harlequin Maple 'Erectum'
Harlequin Maple 'Globosum' Harlequin Maple 'Goldsworth Purple'
Harlequin Maple 'Greenlace' Harlequin Maple 'Maculatum'
Harlequin Maple 'Olmsted' Harlequin Maple 'Royal Red'
Harlequin Maple 'Schwedleri' Harlequin Maple 'Summershade'
Harlequin Maple 'Superform' Harlequin Maple 'Undulatum'
'Harlequin' Wintercreeper Harmomy Manzanita
'Harmony' Oakleaf Hydrangea 'HARpageant (Easy Does It™)' Rose
'Harry Edland' Rose Harry Lauder's Walking Stick 'Atropurpurea'
Harry Lauder's Walking Stick 'Contorta' Harry Lauder's Walking Stick 'Contorta Purpurea'
'Hartlage Wine' Sweetshrub 'Harusume' Japanese Maple
'Harvest Gold™' Flowering Crabapple 'Harvest Red' Holly
'Hasse' Southern Magnolia Hat Palm
Hat Plant Hat Plant, Chinese
Hat Tree 'Hatfieldii' Anglojapanese Yew
Hat-Rack Cactus 'Hattie Carthan' Magnolia
Haw, Possum (spp.) Haw, Possum 'Brandywine™'
Haw, Possum 'Winterthur' Haw, Swamp (spp.)
Haw, Swamp 'Brandywine™' Haw, Swamp 'Winterthur'
Hawaiian Beach Berry Hawaiian Hibiscus (spp.)
Hawaiian Hibiscus 'Caleb' Hawaiian Hibiscus 'Candy Striper'
Hawaiian Hibiscus 'Daddy's Girl' Hawaiian Hibiscus 'Dark Continent'
Hawaiian Hibiscus 'Erin Rachael' Hawaiian Hibiscus 'Hawaiian Salmon'
Hawaiian Hibiscus 'Jason' Hawaiian Hibiscus 'Smoky Mountian'
Hawaiian Hibiscus 'Snow Queen' Hawaiian Hibiscus 'The Pearl'
Hawaiian Hibiscus 'TieDye Wind' 'Hawaiian Salmon' Chinese Hibiscus
Hawaiian Schefflera (spp.) Hawaiian Schefflera 'Gold Cappella'
Hawaiian Snow Bush 'Roseopicta' Hawthorn
Hawthorn, Apple Hawthorn, Dotted
Hawthorn, Downy Hawthorn, English (spp.)
Hawthorn, English 'Paul's Scarlet' Hawthorn, Green 'Winter King'
Hawthorn, Indian 'Clara' Hawthorn, Indian 'Fascination'
Hawthorn, Indian 'Olivia' Hawthorn, May
Hawthorn, Round-leaf Hawthorn, Russian
Hawthorn, Southern 'Winter King' Hawthorn, Washington
Hawthorn, Yedda Hawthorn: monogyna, English (spp.)
Hawthorn: monogyna, English 'Inermis Compacta' 'Hayden' Japanese Holly
Hazel Hazel, Corkscrew 'Atropurpurea'
Hazel, Corkscrew 'Contorta' Hazel, Corkscrew 'Contorta Purpurea'
Hazel, Turkish Hazelnut 'Atropurpurea'
Hazelnut 'Contorta' Hazelnut 'Contorta Purpurea'
Hazelnut, American Hazelnut: americana