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  Plantae
      Charophyta
        Streptophytina
            Equisetopsida
              Magnoliidae
                    Cornales
                            Hydrangeaceae
                                     Carpenteria
                                             Carpenteria californica
                                     Decumaria
                                             Decumaria barbara
                                     Deutzia
                                             Deutzia crenata
                                             Deutzia discolor
                                             Deutzia glabrata
                                             Deutzia glomeruliflora
                                             Deutzia gracilis
                                             Deutzia grandiflora
                                             Deutzia hypoglauca
                                             Deutzia longifolia
                                             Deutzia magnifica
                                             Deutzia mollis
                                             Deutzia monbeigii
                                             Deutzia parviflora
                                               Deutzia parviflora var. ovatifolia
                                             Deutzia reflexa
                                             Deutzia scabra
                                               Deutzia scabra var. candidissima
                                             Deutzia schneideriana
                                               Deutzia schneideriana var. laxiflora
                                             Deutzia setchuenensis
                                             Deutzia sieboldiana
                                             Deutzia staminea
                                             Deutzia vilmorinae
                                     Edwinia
                                     Fendlera
                                             Fendlera rigida
                                             Fendlera rupicola
                                               Fendlera rupicola var. falcata
                                               Fendlera rupicola var. wrightii
                                             Fendlera wrightii
                                     Fendlerella
                                             Fendlerella utahensis
                                               Fendlerella utahensis var. cymosa
                                               Fendlerella utahensis var. utahensis
                                     Hydrangea
                                           [Adamia]
                                           [Broussaisia]
                                             Hydrangea anomala
                                               Hydrangea anomala subsp. petiolaris
                                             Hydrangea arborescens
                                                   [Hydrangea vulgaris]
                                               Hydrangea arborescens var. deamii
                                               Hydrangea arborescens var. discolor
                                               Hydrangea arborescens var. oblonga
                                               Hydrangea arborescens var. sterilis
                                             Hydrangea arguta
                                                   [Broussaisia arguta f. oppositifolia]
                                                   [Broussaisia arguta]
                                             Hydrangea aspera
                                             Hydrangea barbara
                                                   [Decumaria sarmentosa]
                                             Hydrangea bretschneideri
                                             Hydrangea cinerea
                                                   [Hydrangea arborescens ssp. discolor]
                                                   [Hydrangea arborescens subsp. discolor]
                                                   [Hydrangea ashei]
                                             Hydrangea febrifuga
                                                   [Adamia cyanea]
                                             Hydrangea heteromalla
                                                   [Hydrangea vestita]
                                               Hydrangea heteromalla var. mollis
                                             Hydrangea hortensis
                                             Hydrangea macrophylla
                                                   [Hortensia speciosa]
                                             Hydrangea paniculata
                                               Hydrangea paniculata var. grandiflora
                                             Hydrangea petiolaris
                                             Hydrangea quercifolia
                                             Hydrangea radiata
                                                   [Hydrangea arborescens ssp. radiata]
                                                   [Hydrangea glauca]
                                                   [Hydrangea nivea]
                                             Hydrangea scandens
                                             Hydrangea xanthoneura
                              Hydrangeoideae
                                     Jamesia
                                             Jamesia americana
                                               Jamesia americana var. californica
                                               Jamesia americana var. americana
                                               Jamesia americana var. macrocalyx
                                               Jamesia americana var. rosea
                                                     [Edwinia californica]
                                                     [Jamesia americana ssp. californica]
                                               Jamesia americana var. zionis
                                             Jamesia tetrapetala
                                     Philadelphus
                                             Philadelphus argenteus
                                                   [Philadelphus microphyllus ssp. argenteus]
                                             Philadelphus argyrocalyx
                                                   [Philadelphus microphyllus ssp. argyrocalyx]
                                             Philadelphus brachybotrys
                                             Philadelphus californicus
                                                   [Philadelphus lewisii ssp. californicus]
                                             Philadelphus confusus
                                             Philadelphus cordifolius
                                             Philadelphus coronarius
                                             Philadelphus coulteri
                                             Philadelphus crinitus
                                             Philadelphus delavayi
                                             Philadelphus ernestii
                                             Philadelphus floridus
                                               Philadelphus floridus var. faxonii
                                               Philadelphus floridus var. rehderianus
                                             Philadelphus gattingeri
                                             Philadelphus hirsutus
                                                   [Philadelphus floribundus]
                                               Philadelphus hirsutus var. intermedius
                                               Philadelphus hirsutus var. nanus
                                             Philadelphus hitchcockianus
                                             Philadelphus incanus
                                             Philadelphus inodorus
                                                   [Philadelphus gloriosus]
                                                   [Philadelphus grandiflorus]
                                               Philadelphus inodorus var. carolinus
                                               Philadelphus inodorus var. grandiflorus
                                               Philadelphus inodorus var. laxus
                                               Philadelphus inodorus var. strigosus
                                             Philadelphus insignis
                                             Philadelphus laxus
                                             Philadelphus lewisii
                                                   [Philadelphus gordonianus var. columbianus]
                                                   [Philadelphus gordonianus]
                                                   [Philadelphus lewisii ssp. gordonianus]
                                               Philadelphus lewisii var. angustifolius
                                               Philadelphus lewisii var. ellipticus
                                               Philadelphus lewisii var. gordonianus
                                               Philadelphus lewisii var. helleri
                                               Philadelphus lewisii var. intermedius
                                               Philadelphus lewisii var. oblongifolius
                                               Philadelphus lewisii var. parvifolius
                                               Philadelphus lewisii var. platyphyllus
                                             Philadelphus maculatus
                                             Philadelphus madrensis
                                             Philadelphus magdalenae
                                             Philadelphus mearnsii
                                             Philadelphus mexicanus
                                             Philadelphus microphyllus
                                                   [Philadelphus microphyllus ssp. occidentalis]
                                                   [Philadelphus microphyllus ssp. stramineus]
                                                   [Philadelphus microphyllus ssp. typicus]
                                                   [Philadelphus occidentalis var. occidentalis]
                                                   [Philadelphus occidentalis]
                                                   [Philadelphus stramineus]
                                               Philadelphus microphyllus var. argenteus
                                               Philadelphus microphyllus var. linearis
                                               Philadelphus microphyllus var. minutus
                                               Philadelphus microphyllus var. occidentalis
                                               Philadelphus microphyllus var. ovatus
                                             Philadelphus oreganus
                                             Philadelphus palmeri
                                             Philadelphus pekinensis
                                               Philadelphus pekinensis var. brachybotrys
                                               Philadelphus pekinensis var. dasycalyx
                                             Philadelphus pubescens
                                               Philadelphus pubescens var. verrucosus
                                               Philadelphus pubescens var. intectus
                                                     [Philadelphus intectus var. pubigerus]
                                                     [Philadelphus intectus]
                                               Philadelphus pubescens var. pubescens
                                                     [Philadelphus latifolius]
                                             Philadelphus pumilus
                                               Philadelphus pumilus var. ovatus
                                               Philadelphus pumilus var. pumilus
                                                     [Philadelphus microphyllus ssp. pumilus]
                                             Philadelphus purpurascens
                                             Philadelphus satsumanus
                                             Philadelphus schrenkii
                                               Philadelphus schrenkii var. jackii
                                             Philadelphus sericanthus
                                             Philadelphus serpyllifolius
                                             Philadelphus sharpianus
                                               Philadelphus sharpianus var. parviflorus
                                             Philadelphus tenuifolius
                                             Philadelphus texensis
                                               Philadelphus texensis var. coryanus
                                               Philadelphus texensis var. texensis
                                             Philadelphus tomentosus
                                                   Philadelphus tomentosus f. nepalensis
                                             Philadelphus trichothecus
                                             Philadelphus verrucosus
                                             Philadelphus wootonii
                                             Philadelphus zelleri
                                             Philadelphus zeyheri
                                             Philadelphus ×virginalis
                                     Schizophragma
                                             Schizophragma hydrangeoides
                                     Whipplea
                                             Whipplea modesta
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