informal grade grouping taxa common characteristics orders majority species flowers relatively large coloured characteristic similar found lily like refers flowers having resemble taxonomic terms applied times early nineteenth century species group plants broadly defined family lily family classification systems found books sources distinguished development molecular theory phylogenetic methods 1990s resulted subsequent orders subsequent work shown recently recognized orders group resulting modern concept constituent orders resulted treating informal groups sense form sister group description true descriptive term relates conspicuous like resemble true considered possess groups fold flowers considered derived lily like flower relatively similar typical fused superior superior single hollow style orientation rows base floral shared characteristics rare conform general pattern pattern ancestral structural rare trends apparent notably change inferior reduction number groups genus clearly differentiated flower coloured smaller green retain like flowers term accurate group term occasionally describing morphological concept animal attracting opposed wind plants grasses evolved different floral structures structure shows main types nearly comparison orders orders branched flowers differ ways cases like insignificant like coloured called numerous later evolved kinds flower lily like order comprising grasses rushes flowers small species brightly coloured flowers apparent structure misleading example small hidden expanded brightly coloured resemble mistaken history morphological definitions earliest grouping corresponding tribe system consisted tribes grasses divided orders roughly corresponding families orders successive emphasized grouping species bearing concept natural grouping flowers predominantly gave notion term core group term widely varying interpretations narrower applications lily like meaning orders term applied restricted broadly defined points particularly broad meaningless refer species conspicuous segments cover broad families estimated dozen orders authors defined equally broadly having like chase stated taxonomic unit considerable state significant variation systems classification systems based morphological characters species clearly departed lily pattern easily placed separate families example contained species flowers inferior contained inferior remaining taxa broadly defined usually system definition example colleagues responsible radical reorganisation families monograph defined orders contain bulk development dna use genetic data determining relationships species confirmed long suspected highly family demonstrated include significant number unrelated groups belonged separate families orders instance genera previously placed reclassified families case chase reviewed understanding designated pointed understanding group critical establishment classification noted authors treated group having common ancestor closer reading texts revealed evidence excluding descendants common ancestor instance based single discussing admitted undoubtedly treated split placed orders phylogenetic era study chase referred largest use purely molecular data results demonstrated data contradicted purely morphological reluctant draw definite conclusions group identified major named addition core group based names groups closest corresponding orders exception based obvious equivalent clear clade corresponding families distributed largely grouped exception formed major labelled higher lower included hand number families orders segregated remaining families genera found finally found belong taxa found formed families variety orders including formed attempt resolve apparent differences morphological defined trees combined analysis undertaken confirmed provided modifications undertaken included removal tribes inclusion additional families newly narrowly contained orders included analysis allowed establishment single time presence inferior significantly authors noted wonder authors classifications findings presented conference addition studies available interim formed basis consensus scheme things expanded new orders placement represented new families added formally assigning ranks classification recognize informal grouping orders recognized orders grouped resulting closely represent concept left families including simultaneous release classification events publication major monograph defined orders devoted entire section included update previous research chase colleagues occasion felt data forward definitive classification defining comprising orders placed colleagues followed chase term noting unresolved orders remaining time new data justify system new classification issued resulted changes orders affect relationship discussed formally recognized renamed grouping named remained second version coincided conference findings additional molecular markers helped resolve remaining questions relationships shown included chase refers placed order demonstrated sister rapid advances understanding relationships necessitated release revision classification incorporated advances definition relationships multiple markers continuing textbooks sources produced century inevitably based older classifications publications versions system appearing uses iii system phylogeny website classification shown treat falling major non organize research teams similar approach taken plant phylogeny evolution shown displays orders based molecular phylogenetic evidence orders constitute groups common ancestor include direct descendants case sister group form clade groups joined thick lines need included collectively referred remaining referred core relationship orders exception sister orders succession line leads numbers indicate crown group recent common ancestor sampled species clade interest divergence times million years ago commonly understood relationship davis combination suggested treated excluding largest family sister groups turn sister data produced conflicting models nuclear genes found evidence sister relationship divergence time estimates varied considerably able obtain molecular clock estimates origin approximately cretaceous period hand large data set combined analysis nuclear mitochondrial genes nuclear agreement earlier relationships subdivision orders
Lilioid monocots