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taxonomy root taxonomic classification annona reticulata annona muricata annonaceae floral formula annonaceae floral diagram annonaceae economic importance annonaceae root annonaceae stem annonaceae leaf annonaceae inflorescence annonceae flower annonaceae calyx annonaceae corolla annonaceae androecium annonaceae gynoecium annonaceae fruit annonaceae seed hutchinson's systems of classification phylogenetic systems john hutchinson classification of flowering plants embryology modern taxonomy embryo binomial nomenclature system anther microspore tapetum stamen archesporium pollen mother cell endothecium middle layers root characteristics root types root functions rootless plants tap adventitious trapa foliar roots golgi apparatus golgi complex golgi bodies dictyyosomes golgi structure and function of golgi complex cell biology cell organelles annonaceae annona squamosa williamsonniella magnolia strobilus flower extinctgenuscycadeoidea primitiveangiosperms primitive histology histologicalorganization histologicalorganizationofrootapex histologicalorganizationofshootapex histologicalorganizationofrootandshootapices apicalcelltheory histogentheory tunicacorpustheory apicalcell histogen dermatogen periblem plerome tunica corpus primary structure primaryplantbody monocotroot monocot maizeroot carolous linnaeus carl von linn茅 nomenclature scientific names common names plant nomenclature icbn icn international code of botanical nomenclature international code of nomenclature botany systematics herbarium herbariumobjectives herbariumdefinition herbariumfunctions worldherbaria indianherbaria majorherbariaofworld majorherbariaofindia bennettitales bennettitaleantheory bennettitalean originofangiosperms evolutionofangiosperms originandevolutionoffloweringplants cycadeoidea maize