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  Plantae
    Tracheophyta
           [Tracheobionta]
    Spermatophyta
      Magnoliophyta
             [Angiospermae]
         Monocots
                [Liliatae]
                [Liliopsida]
                [Monocotyledoneae]
                    Pandanales
                            Velloziaceae
                                     Aylthonia
                                     Barbacenia
                                             Barbacenia bicolor
                                             Barbacenia blackii
                                                   [Aylthonia blackii]
                                             Barbacenia blanchetii
                                             Barbacenia curviflora
                                             Barbacenia delicatula
                                             Barbacenia elegans
                                             Barbacenia flava
                                                   [Barbacenia sellowii]
                                             Barbacenia gentianoides
                                               Barbacenia gentianoides subsp. magalhaesii
                                                     [Barbacenia magalhaesii]
                                             Barbacenia longiflora
                                             Barbacenia longiscapa
                                             Barbacenia pabstiana
                                             Barbacenia paranaensis
                                                   [Aylthonia paranaensis]
                                             Barbacenia trigona
                                             Barbacenia umbrosa
                                     Barbaceniopsis
                                             Barbaceniopsis castillonii
                                             Barbaceniopsis humahuaquensis
                                     Nanuza
                                             Nanuza plicata
                                     Talbotia
                                     Vellozia
                                             Vellozia abietina
                                             Vellozia albiflora
                                                   [Vellozia crassicaulis]
                                             Vellozia aloifolia
                                             Vellozia alutacea
                                                   [Vellozia crassirama]
                                                   [Vellozia variabilis]
                                             Vellozia angustifolia
                                             Vellozia bahiana
                                             Vellozia brevifolia
                                             Vellozia burlemarxii
                                             Vellozia caput-ardeae
                                             Vellozia caruncularis
                                             Vellozia ciliata
                                             Vellozia compacta
                                             Vellozia coronata
                                             Vellozia cryptantha
                                             Vellozia dasypus
                                             Vellozia dawsonii
                                             Vellozia declinans
                                             Vellozia epidendroides
                                                   [Vellozia gracilis]
                                             Vellozia froesii
                                             Vellozia geotegens
                                             Vellozia glauca
                                             Vellozia grao-mogulensis
                                             Vellozia harleyi
                                             Vellozia hirsuta
                                             Vellozia jolyi
                                             Vellozia marcescens
                                             Vellozia minima
                                             Vellozia ornata
                                             Vellozia patens
                                             Vellozia prolifera
                                             Vellozia pulchra
                                             Vellozia punctulata
                                             Vellozia sincorana
                                             Vellozia squamata
                                             Vellozia tubiflora
                                                   [Vellozia lithophila]
                                                   [Vellozia panamensis]
                                             Vellozia variegata
                                     Xerophyta
                                             Xerophyta abietina
                                             Xerophyta acuminata
                                                   [Vellozia acuminata]
                                             Xerophyta argentea
                                                   [Vellozia argentea]
                                             Xerophyta capillaris
                                                   [Barbacenia capillaris]
                                                   [Vellozia capillaris]
                                               Xerophyta capillaris var. capillaris
                                               Xerophyta capillaris var. occultans
                                             Xerophyta concolor
                                             Xerophyta demeesmaekeriana
                                             Xerophyta elegans
                                                   [Talbotia elegans]
                                                   [Vellozia elegans]
                                             Xerophyta equisetoides
                                                   [Vellozia equisetoides]
                                                   [Xerophyta equisetoides var. setosa]
                                             Xerophyta eylesii
                                                   [Vellozia eylesii]
                                             Xerophyta goetzei
                                                   [Barbacenia goetzei]
                                             Xerophyta hirtiflora
                                             Xerophyta humilis
                                                   [Barbacenia humilis]
                                                   [Barbacenia minuta]
                                                   [Vellozia humilis]
                                                   [Vellozia minuta]
                                             Xerophyta kirkii
                                                   [Vellozia kirkii]
                                             Xerophyta monroi
                                                   [Vellozia monroi]
                                             Xerophyta naegelsbachii
                                                   [Barbacenia naegelsbachii]
                                             Xerophyta nutans
                                               Xerophyta nutans var. nutans
                                               Xerophyta nutans var. plumosa
                                             Xerophyta pauciramosa
                                                   [Xerophyta equisetoides var. pauciramosa]
                                             Xerophyta pseudopinifolia
                                             Xerophyta retinervis
                                                   [Vellozia retinervis]
                                             Xerophyta rippsteinii
                                             Xerophyta scabrida
                                                   [Barbacenia scabrida]
                                                   [Vellozia scabrida]
                                             Xerophyta schlechteri
                                                   [Barbacenia schlechteri]
                                                   [Vellozia schlechteri]
                                             Xerophyta schnizleinia
                                                   [Barbacenia amica]
                                                   [Hypoxis schnizleinia]
                                                   [Vellozia schnizleinia]
                                                   [Xerophyta hildebrandtii]
                                               Xerophyta schnizleinia var. occidentalis
                                               Xerophyta schnizleinia var. schnizleinia
                                                     [Barbacenia hildebrandtii]
                                                     [Hypoxis schnitzleinia]
                                                     [Schnizleinia amica]
                                                     [Vellozia hildebrandtii]
                                                     [Vellozia schnizleinia var. brevifolia]
                                                     [Vellozia schnizleinia var. occidentalis]
                                                     [Vellozia schnizleinia var. somalensis]
                                                     [Vellozia somalensis]
                                                     [Xerophyta schnizleinia var. somalensis]
                                                     [Xerophyta somalensis]
                                             Xerophyta seinei
                                             Xerophyta simulans
                                             Xerophyta spekei
                                                   [Barbacenia aequatorialis]
                                                   [Barbacenia helenae]
                                                   [Barbacenia spekei]
                                                   [Barbacenia tomentosa]
                                                   [Vellozia aequatorialis]
                                                   [Vellozia spekei]
                                                   [Vellozia tomentosa]
                                                   [Xerophyta aequatorialis]
                                                   [Xerophyta tomentosa]
                                             Xerophyta splendens
                                                   [Barbacenia splendens]
                                                   [Vellozia splendens]
                                             Xerophyta squarrosa
                                                   [Vellozia squarrosa]
                                             Xerophyta stenophylla
                                                   [Vellozia stenophylla]
                                             Xerophyta suaveolens
                                               Xerophyta suaveolens var. suaveolens
                                                     [Vellozia suaveolens]
                                               Xerophyta suaveolens var. vestita
                                             Xerophyta tanzaniana
                                             Xerophyta trichophylla
                                                   [Vellozia equisetoides var. trichophylla]
                                                   [Vellozia trichophylla]
                                                   [Xerophyta barbarae subsp. cuprophila]
                                                   [Xerophyta barbarae]
                                                   [Xerophyta equisetoides var. trichophylla]
                                             Xerophyta velutina
                                                   [Barbacenia velutina]
                                                   [Vellozia velutina]
                                             Xerophyta villosa
                                                   [Barbacenia villosa]
                                                   [Vellozia villosa]
                                                   [Vellozia violacea]
                                                   [Xerophyta bakeri]
                                                   [Xerophyta mollissima]
                                                   [Xerophyta violacea]
                                             Xerophyta viscosa
                                                   [Barbacenia hereroensis]
                                                   [Vellozia viscosa]
                                                   [Xerophyta hereroensis]
                                             Xerophyta wentzeliana
                                                   [Barbacenia wentzeliana]
                                                   [Vellozia wentzeliana]
                                                   [Xerophyta equisetoides var. pubescens]
                                               Xerophyta wentzeliana var. verrucosa
                                               Xerophyta wentzeliana var. wentzeliana
                                             Xerophyta zambiana
                                             Xerophyta zimbabwensis