菊科大丁草属植物的新编检索表

A New Identification Key of the Leibnitzia Cass. in Compositae

大丁草属(Leibnitzia Cass.)植物原属于广义火石花属(Gerbera L.),因其独特的"春秋二型"性状,而被再次分立到大丁草属中。通过对大丁草属植物进行大量的野外观察和室内移栽实验,深入观察叶片变异、根部形态、花部结构和种子特征,重新编写了大丁草属植物的检索表。本检索表还首次将分布于中亚的Leibnitzia knorringiana(B.Fedtsch.)Pobed和分布于北美的琴裂大丁草L.lyrata(Sch.-Bip.)G.L.Nesom和墨西哥大丁草L.occimadrensis G.L.Nesom包括在内,使其成为世界范围内大丁草属最为完整的检索表。经检验,该检索表能很好地鉴定国内主要标本馆(KUN,PE)内的馆藏大丁草属植物标本。

Leibnitzia Cass.Originally belongs to Gerbera L..Because of its unique"sexual seasonal dimorphism"character,it is once again classified as the Leibnitzia Cass..Due to the lack of comprehensive observation on the biological characteristics of spring and autumn type plants,the species characteristics compiled by the existing identification key are not clear,and there are great uncertainties in the process of specific field investigation and indoor specimen identification.Based on a large number of field observation and indoor transplanting experiments,the leaf variation,root morphology,flower structure and seed characteristics were deeply observed,and the identification key to the genus was recompiled.L.knorringiana(B.Fedtsch.)Pobed distributed in Central Asia,Leibnitzia lyrata(SCH.-BiP.)G.L.Nesomin North America and L.occimadrensis G.L.Nesom in Mexico are included in this identification key for the first time,which makes it the most complete identification key to the genus in the world.Through examination,the identification key can identify the specimens of the Leibnitzia Cass.collected in the main herbarium in China(KUN,PE).