Families (As per APG III)

 
A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z

H

Haemodoraceae - 1 (Anigozanthos flavescens)

Haloragaceae - 10 (Haloragis micrantha, Laurembergia coccinea, Myriophyllum aquaticum, Myriophyllum indicum, Myriophyllum intermedium, Myriophyllum oliganthum, Myriophyllum siamense, Myriophyllum spicatum, Myriophyllum tetrandrum, Myriophyllum tuberculatum)

Hamamelidaceae - 6 (Altingia excelsa, Corylopsis himalayana, Exbucklandia populnea, Laurembergia coccinea var. zeylanica, Liquidambar styraciflua, Loropetalum chinense)

Heliconiaceae - 4 (Heliconia angusta, Heliconia bihai, Heliconia psittacorum, Heliconia rostrata)

Hernandiaceae - 3 (Gyrocarpus americanus, Illigera khasiana, Illigera villosa)

Hydatellaceae - 1 (Trithuria konkanensis)

Hydrangeaceae - 17 (Deutzia compacta, Deutzia macrantha, Deutzia scabra, Deutzia staminea, Dichroa febrifuga, Hydrangea angustipetala, Hydrangea anomala, Hydrangea aspera, Hydrangea aspera subsp. robusta, Hydrangea heteromalla, Hydrangea macrophylla, Hydrangea stylosa, Philadelphus coronarius, Philadelphus tomentosus, Pileostegia subansiriana, Rhodiola himalensis, Sedum triactina)

Hydrocharitaceae - 22 (Blyxa aubertii, Blyxa echinosperma, Blyxa octandra, Enhalus acoroides, Halophila beccarii, Halophila decipiens, Halophila ovalis, Halophila ovalis subsp. ramamurthiana, Halophila ovata, Halophila stipulacea, Hydrilla verticillata, Lagarosiphon alternifolia, Najas graminea, Najas indica, Najas malesiana, Najas marina, Najas minor, Nechamandra alternifolia, Ottelia alismoides, Udora fernandesii, Vallisneria natans, Vallisneria spiralis)

Hydroleaceae - 3 (Hydrolea zeylanica, Wigandia caracasana, Wigandia kunthii)

Hypericaceae - 24 (Cratoxylum formosum, Cratoxylum polyanthum, Cratoxylum sumatranum subsp. neriifolium, Hypericum androsaemum, Hypericum assamicum, Hypericum choisianum, Hypericum dyeri, Hypericum elodeoides, Hypericum gaitii, Hypericum gramineum, Hypericum griffithii, Hypericum himalaicum, Hypericum hookerianum, Hypericum humifusum, Hypericum japonicum, Hypericum monanthemum, Hypericum monogynum, Hypericum mysurense, Hypericum oblongifolium, Hypericum patulum, Hypericum perforatum, Hypericum podocarpoides, Hypericum uralum, Hypericum wightianum)

Hypoxidaceae - 8 (Curculigo capitulata, Curculigo crassifolia, Curculigo gracilis, Curculigo maharashtrensis, Curculigo orchioides, Curculigo savantwadiensis, Curculigo trichocarpa, Hypoxis aurea)