Révision synoptique du genre Lastreopsis Ching (Dryopteridaceae) à Madagascar

[摘要] SynopticrevisionofthegenusLastreopsisChing(Dryopteridaceae)inMadagascar.ThispaperpresentsasynopticrevisionofthegenusLastreopsisChing(Dryopteridaceae)inMadagascar.Anewidentificationkeyispresented,alongwithnewdistributionmaps.ThepresenceofL.barteriana(Hook.)Tardieu,anAfricanspecies,isindicatedforthefirsttime.Threenewspeciesaredescribed:1)L.coriaceosquamataRakotondr.resemblesL.boivinii(Baker)Tardieubutcanbedistinguishedbydifferencesinthemorphologyofthescalespresentonitsrhizomeandpetiolebase,whichisbrownishblack,coriaceous,flat,andappressed;2)L.manongarivensisRakotondr.canbeeasilydistinguishedbyitsuprightrhizomecoveredwithred,membraneousscales;and3)L.fideleiRakotondr.hasmediansorisimilartothoseofL.currorii(Mett.exKuhn)Tindalebutcanbedistinguishedbyhavingnon-gemmiferousfronds,medianpinnaethatare1-pinnate-pinnatifidandindusiawithentiremargins.TwoAfricanspecies,L.curroriiandL.subsimilis(Hook.)Tindale,havebeencitedintheliteratureasoccurringinMadagascar,butthematerialfromtherediffersclearlyfromthetypespecimens,andthesetaxaarenolongerthoughttooccurinMadagascar.ThetypeofLastreopsishornei(Baker)TindalefromtheSeychelles,isfragmentary,andthisnameistreatedas“insufficientlyknown”.Finally,alectotypeisdesignatedforNephrodiumgranulosumBaker,asynonymofL.boivinii.

[学科分类] 植物学

[关键词] Pteridophyta;Dryopteridaceae;Lastreopsis;Madagascar;espèces nouvelles;lectotypification;Pteridophyta;Dryopteridaceae;Lastreopsis;Madagascar;new species;lectotypification