【摘要】 该文发表采自安徽的一个薹草属新种,即类嵩薹草(Carex kobresiformisS.W.Su),该种在其侧生小穗上的几乎所有的果胞都有发育良好的生有2~5枚雄花的次生小穗轴,从而形成为两性支小穗.这不仅与Schoenoxiphium以及嵩草属(Kobresia)的支小穗具有相似的结构,而且其整个侧生小穗也与嵩草属的穗状花序相似.作者曾从野外挖掘完整植株带回住地栽培,经过数年观察,确证其由果胞发出的两性支小穗的性状是极其稳定的,这或许是返祖演化的结果,在薹草属(Carex)中是极为奇特、极为罕见的.更多还原

【Abstract】 A new species of genus Carex was described from Anhui province,China,i.e Carex kobresiformis S.W.Su.The new species reported in this paper is a particular species of Carex,and its spikelet may be regarded as a primitive form of atavistic spikelets in Carex.Almost all the utricles of lateral spikelets have been found with a well-developed rachilla bearing 2-5 male flowers,and actually have become bisexual partial spikelets.C.kobresiformis is not only quite the same in the structure of partial spikelet as that of Schoenoxiphium and Kobresia,yet the whole structure of lateral spikelets is also similar to the single spike of Kobresia,so it has all the characteristics of Kobresia.Although it has some features very similar to those of Kobresia,since the partial spikelets,developing within utricules,may be ragarded as a result of the atavistic evolution.Therefore this particular plant,C.kobresiformis,still belongs to Carex.The remarkable plant was first collected in 1983 by the author in Taihu county of Anhui province of China.At that time,since the male flowers of the terminal spikelets of the specimens were contaminated with smut fungi,the author thought it might be an aberrant plant of C.polyschoena.In 1987,some healthy plants were found again in Shu-cheng County of Anhui province,which attracted the author’s attention.Having collected some specimens,the author transplanted the living plants in his yard in Hefei.Several years of their observation and reserches about them have confirmed the author that it is not C.polyschoena,but a new type relation to C.chinensis and for the time being,he named it C.kobresioides.Recently,the anthor has learnt that the other species of Carex has been named by the former C.kobresioides.So he renamed it C.kobresiformis S.W.Su.The character of the bisexual partial spikelets,developing out of the utricales as in C.kobresiformis is quite rare in Carex,The author hopes it may attract the profession’s attention and stimulate further inquiries into the problems concerned.更多还原