Survey of Lagerstroemia L. (Lythraceae) in Indochina (excl. Thailand) with the description of Lagerstroemia densiflora, sp. nov., a new species from Vietnam

摘要

LagerstroemiaL.(Lythraceae)inIndochina(Cambodia,Laos,andVietnam)comprises21species.Sixspecies,namelyLagerstroemiadensifloraW.J.deWildeamp;Duyfjes,sp.nov.,L.gagnepainiiFurtadoamp;Srisuko,L.kratiensisW.J.deWildeamp;Duyfjes,L.micranthaMerr.,L.lecomteiGagnep.,L.petiolarisPierreexLaness.,onlyoccurinIndochine.LagerstroemiadensifloraW.J.deWildeamp;Duyfjes,sp.nov.,fromVietnam,isnewtoscience;itdiffersfromthemostsimilarLagerstroemiaduperreanaPierreexGagnep.byacompactanddenselyfloweredinflorescence,thecalyxtubesmoothandunridged,thepseudopedicelatanthesis3-4mmlong,infruit4-5mmlong,andtheglabrouscapsuleswithasmoothsurface.Foreachspeciestheoriginalreference,typification,spot-charactersanddistributionarepresented.Therearetwokeystothespecies,oneforfloweringandoneforfruitingmaterial.