国产球盖蕨科的系统学分析

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1、Peranemaceae．1．LeafepidermisBycomprationwimthreeaspectsofthefeaturesofupepidermal、stomatalstyles、thestomataldensity．InPeranemaceaeandNothoperanema(Tagawa)Ching，thepatternofanticlinalwallsoftheupepidermalismostlyirregularconcaveconvexorsinuolate，themostofcell’Sshapeislong，themainstyleof

2、stomataliscoaxillocyticoraxillocytic，polocyticandcopolicyticarelesser,bothPeranemaceaeandNothoperanema(Tagawa)Chinghaveasmallquantityofanomoteracyticandanomocytic．Besidesthese，pericyticappearinPeranemaceae，desmocyticappearinNothoperanema(Tagawa)ChingThestomataldensityofPeranemaceaeis4．

3、1-12．2pieces／mm2，Nothoperanema(Tagawa)Chingis8．5—14．8pieces／mm2．ThepatternofanticlinalwallsofupepidermalofLithostegiaChingisvertical，theshapeofthecellislong，Anomoteracyticandbrachyparacyticaremainpatternofthestylesofstomatal，thestomataldensityis4．7pieces／mmz．ThefeaturesofupepidermalofP

4、eranemaceaeareclosetotheNothoperanema(Tagawa)Ching，2．TraehearyelementsTrachearyelementsof10speciesofPeranemaceaeand3speciesofNothoperanema(Tagawa)Chingand1speciesofLithostegiaChingfromChinawereexaminedbyscanningelectronmicroscopy(SEM)．Theresultsindicatethattheendwallshavethesamemorphol

5、ogicalcharacteristicsandstructureasthelateralwalls．Thelateralwallshaveperforationplates．Thetrachearyelementscouldalsobedividedinto4types：(1)scalariformwithoutdimorphicwidthperforation；(2)scalariformwithperforationpitdimorphism；(3)reticulate—scalariformplates；(4)coarse—poredperforationp

6、lates．Accordingtotheextentofremnantsofpitmembrane，Nothoperanema(Tagawa)ChingisclosetothePeranemaceaehardly，bothofthemhave3styles：someregionhaveintactpitmembrane，weblikeorthreadlike，alittleorwithout．ThefeaturesoftrachearyelementsindicatethatPeranemaceaeandNothoperanema(Tagawa)Chinghavec

7、loseconnection．TheLithostegiaChingwasconsideredasamemberofPeranemaceaeforalongtime，accordingtotheresearch，wefoundthatithasthetypicalscalariformperforationplates，noassociatedorcrossedphenomena，andsomeregionhaveintactplate，nodimorphicVphenomena，noweblikeorthreadlikeremnants，thesesugges