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  Plantae
      Magnoliophyta
         Eudicots
                    Ranunculales
                            Papaveraceae
                                     Adlumia
                                             Adlumia fungosa
                                     Arctomecon
                                             Arctomecon californica
                                             Arctomecon humilis
                                             Arctomecon merriamii
                                     Argemone
                                             Argemone aenea
                                             Argemone alba
                                             Argemone albiflora
                                               Argemone albiflora ssp. albiflora
                                                     [Argemone alba]
                                               Argemone albiflora ssp. texana
                                                     [Argemone albiflora var. texana]
                                             Argemone arizonica
                                             Argemone aurantiaca
                                             Argemone chisosensis
                                             Argemone corymbosa
                                               Argemone corymbosa ssp. arenicola
                                                     [Argemone corymbosa var. arenicola]
                                               Argemone corymbosa ssp. corymbosa
                                             Argemone glauca
                                               Argemone glauca var. decipiens
                                               Argemone glauca var. glauca
                                                     [Argemone glauca var. inermis]
                                             Argemone gracilenta
                                             Argemone hispida
                                                   [Argemone bipinnatifida]
                                                   [Argemone platyceras var. hispida]
                                             Argemone mexicana
                                                   [Argemone leiocarpa]
                                             Argemone munita
                                               Argemone munita ssp. argentea
                                                     [Argemone munita var. argentea]
                                               Argemone munita ssp. munita
                                               Argemone munita ssp. robusta
                                                     [Argemone munita var. robusta]
                                               Argemone munita ssp. rotundata
                                                     [Argemone munita var. rotundata]
                                                     [Argemone rotundata]
                                             Argemone ochroleuca
                                                   [Argemone mexicana var. ochroleuca]
                                                   [Argemone ochroleuca var. stenophylla]
                                             Argemone pleiacantha
                                               Argemone pleiacantha ssp. ambigua
                                                     [Argemone pleiacantha var. ambigua]
                                               Argemone pleiacantha ssp. pinnatisecta
                                                     [Argemone pleiacantha var. pinnatisecta]
                                               Argemone pleiacantha ssp. pleiacantha
                                             Argemone polyanthemos
                                                   [Argemone intermedia var. polyanthemos]
                                                   [Argemone intermedia]
                                                   [Argemone platyceras]
                                             Argemone rotundata
                                             Argemone sanguinea
                                                   [Argemone platyceras var. rosea]
                                             Argemone squarrosa
                                               Argemone squarrosa ssp. glabrata
                                                     [Argemone squarrosa var. glabrata]
                                               Argemone squarrosa ssp. squarrosa
                                     Bicuculla
                                     Bocconia
                                             Bocconia frutescens
                                     Canbya
                                             Canbya aurea
                                             Canbya candida
                                     Capnoides
                                     Chelidonium
                                           [Chlidonium]
                                             Chelidonium majus
                                                   [Chelidonium majus var. laciniatum]
                                                   [Chelidonium majus var. majus]
                                                   [Chelidonium majus var. plenum]
                                                   [Chlidonium majus]
                                     Dendromecon
                                             Dendromecon harfordii
                                                   [Dendromecon rigida ssp. harfordii]
                                             Dendromecon rigida
                                                   [Dendromecon rigida ssp. rhamnoides]
                                                   [Dendromecon rigida ssp. rigida]
                                                   [Dendromecon rigida var. rhamnoides]
                                     Eschscholzia
                                             Eschscholzia caespitosa
                                             Eschscholzia californica
                                               Eschscholzia californica ssp. californica
                                                     [Eschscholzia californica var. crocea]
                                                     [Eschscholzia californica var. douglasii]
                                                     [Eschscholzia californica var. maritima]
                                                     [Eschscholzia californica var. peninsularis]
                                                     [Eschscholzia procera]
                                               Eschscholzia californica ssp. mexicana
                                                     [Eschscholzia mexicana]
                                             Eschscholzia ciliata
                                             Eschscholzia covillei
                                             Eschscholzia glyptosperma
                                             Eschscholzia hypecoides
                                                   [Eschscholzia caespitosa var. hypecoides]
                                             Eschscholzia lemmonii
                                               Eschscholzia lemmonii ssp. kernensis
                                                     [Eschscholzia caespitosa ssp. kernensis]
                                               Eschscholzia lemmonii ssp. lemmonii
                                                     [Eschscholzia lemmonii var. asprella]
                                                     [Eschscholzia lemmonii var. laxa]
                                             Eschscholzia lobbii
                                             Eschscholzia minutiflora
                                               Eschscholzia minutiflora ssp. covillei
                                                     [Eschscholzia covillei]
                                                     [Eschscholzia minutiflora var. darwinensis]
                                               Eschscholzia minutiflora ssp. minutiflora
                                               Eschscholzia minutiflora ssp. twisselmannii
                                                     [Eschscholzia multiflora ssp. twisselmannii]
                                             Eschscholzia multiflora
                                             Eschscholzia palmeri
                                                   [Eschscholzia frutescens]
                                             Eschscholzia parishii
                                             Eschscholzia ramosa
                                                   [Eschscholzia elegans]
                                             Eschscholzia rhombipetala
                                     Glaucium
                                           [Glacium]
                                             Glaucium corniculatum
                                                   [Chelidonium corniculatum]
                                             Glaucium flavum
                                                   [Glacium flavum]
                                     Hesperomecon
                                             Hesperomecon linearis
                                                   [Meconella linearis var. pulchella]
                                                   [Meconella linearis]
                                                   [Platystigma linearis]
                                     Hunnemannia
                                             Hunnemannia fumariifolia
                                     Hypecoum
                                             Hypecoum imberbe
                                                   [Hypecoum grandiflorum]
                                             Hypecoum pendulum
                                     Macleaya
                                             Macleaya cordata
                                                   [Bocconia cordata]
                                                   [Bocconia japonica]
                                     Meconella
                                           [Platystigma]
                                             Meconella californica
                                                   [Meconella collina]
                                                   [Meconella octandra]
                                             Meconella denticulata
                                                   [Meconella oregana var. denticulata]
                                             Meconella oregana
                                     Meconopsis
                                             Meconopsis regia
                                     Papaver
                                           [Stylomecon]
                                             Papaver X strigosum
                                             Papaver alaskanum
                                             Papaver alboroseum
                                                   [Papaver alboroseum var. elongatum]
                                             Papaver alpinum
                                                   [Papaver nudicaule var. pseudocorylatifolium]
                                             Papaver apulum
                                             Papaver argemone
                                             Papaver bracteatum
                                             Papaver californicum
                                                   [Papaver lemmonii]
                                             Papaver commutatum
                                             Papaver cornwallisense
                                             Papaver cornwallisensis
                                             Papaver croceum
                                             Papaver dubium
                                             Papaver freedmanianum
                                             Papaver glaucum
                                             Papaver gorodkovii
                                             Papaver heterophyllum
                                                   [Stylomecon heterophylla]
                                             Papaver hybridum
                                                   [Papaver apulum var. micranthum]
                                             Papaver keelei
                                             Papaver kluanense
                                             Papaver lapponicum
                                                   [Papaver hultenii var. salmonicolor]
                                                   [Papaver hultenii]
                                                   [Papaver lapponicum var. lapponicum]
                                                   [Papaver radicatum ssp. lapponicum]
                                             Papaver lateritium
                                             Papaver macounii
                                               Papaver macounii ssp. discolor
                                                     [Papaver keelei]
                                                     [Papaver macounii var. discolor]
                                                     [Papaver microcarpum]
                                                     [Papaver scammanianum]
                                               Papaver macounii ssp. macounii
                                                     [Papaver alaskanum var. macranthum]
                                             Papaver mcconnellii
                                                   [Papaver denalii]
                                             Papaver microcarpum
                                             Papaver miyabeanum
                                             Papaver nigroflavum
                                             Papaver nudicaule
                                                   [Papaver croceum]
                                               Papaver nudicaule ssp. americanum
                                               Papaver nudicaule ssp. nudicaule
                                                     [Papaver miyabeanum]
                                             Papaver orientale
                                                   [Papaver pseudo-orientale]
                                                   [Papaver pseudoorientale]
                                             Papaver polare
                                             Papaver pygmaeum
                                                   [Papaver radicatum var. pygmaeum]
                                             Papaver radicatum
                                               Papaver radicatum ssp. alaskanum
                                                     [Papaver alaskanum]
                                               Papaver radicatum ssp. kluanense
                                                     [Papaver freedmanianum]
                                                     [Papaver kluanense]
                                                     [Papaver nudicaule var. coloradense]
                                                     [Papaver nudicaule var. columbianum]
                                               Papaver radicatum ssp. polare
                                                     [Papaver cornwallisense]
                                                     [Papaver cornwallisensis]
                                                     [Papaver nudicaule var. albiflora]
                                                     [Papaver polare]
                                                     [Papaver radicatum var. albiflorum]
                                               Papaver radicatum ssp. radicatum
                                                     [Papaver lapponicum ssp. occidentale]
                                                     [Papaver lapponicum ssp. porsildii]
                                                     [Papaver nigroflavum]
                                                     [Papaver nudicaule var. radicatum]
                                                     [Papaver radicatum ssp. occidentale]
                                                     [Papaver radicatum ssp. porsildii]
                                             Papaver rhoeas
                                             Papaver scammanianum
                                             Papaver somniferum
                                                   [Papaver somniferum var. setigerum]
                                             Papaver walpolei
                                                   [Papaver walpolei var. sulphureomaculatum]
                                     Platystemon
                                             Platystemon californicus
                                                   [Platystemon arizonicus]
                                                   [Platystemon californicus var. californicus]
                                                   [Platystemon californicus var. ciliatus]
                                                   [Platystemon californicus var. crinitus]
                                                   [Platystemon californicus var. horridulus]
                                                   [Platystemon californicus var. nutans]
                                                   [Platystemon californicus var. ornithopus]
                                                   [Platystemon confinis]
                                                   [Platystemon mohavensis]
                                     Pseudofumaria
                                     Roemeria
                                             Roemeria multifida
                                             Roemeria palmata
                                             Roemeria pinguis
                                               Roemeria pinguis var. major
                                               Roemeria pinguis var. media
                                               Roemeria pinguis var. minor
                                             Roemeria refracta
                                     Romneya
                                             Romneya coulteri
                                             Romneya trichocalyx
                                                   [Romneya coulteri var. trichocalyx]
                                     Stylophorum
                                             Stylophorum diphyllum