【摘要】 <正> 鳞茎紫堇组(Sect.Oreocapnos)是M.popov于1937年根据产于苏联的C.inconspicua Bge.和C.tenella Kar.et Kir.植株基部具鳞茎为主要特征而建立的。组的模式种:C.inconspicua Bge. 形态特征 纤细小草本,无毛,高5—18厘米。根茎缩短,具鳞茎,鳞片多数,覆瓦状排列,外部鳞片膜质,内部鳞片肉质;须根簇生,不增粗的纤维状或为棒状,纺锤状肉质增更多还原

【Abstract】 Sect. Oreocapnos M. Popov of Corydalis Vent, is mainly characterized by having bulbs, they make up a natural group. In this section there are ten species all told, of which eight occur in China. It is divided into three series according to the shapes of the roots, they are. Ser. 1. Fibrosae C.Y. Wu et H. Chuang of the fibrous roots not thickened, Ser. 2. Clavatae C.Y. Wu et H. Chuang of the thickened, fleshy, clavate fibrous roots, Ser. 3. Fusi-formes C.Y. Wu et H. Chuang of the thickened, fleshy, fusiform fibrous roots. They may be derived from, different more primitive groups which developed towards the identical direction of having bulbs. The latter two series are netive to China, which are similar to Sect. Trachycarpae Fedde and Sect. Rapiferae Fedde with no bulbs in the respects of habit of entire plant and the morphology of roots and the characterstics of flowers, but also intricately overlapping in their range. Doubtlessly, they are the result of the parallel evolution of the two latter sections in adaptation to the natural environments of the high plateau.This section is mainly conccntrately distributed on the margin of Qinghai-Xizang Plateau, its distributon area iranges between 27°-38° N and 85°-103° E, they grow in alpine meadows and screes at an elevation of (3200-)4200 -5100 m. There is a respective tendency of distribution for each of the two series native to China, Series Clavatae C.Y. Wu et H. Chuang formed a southnorthward, belt-shaped distribution along Hengduan mountains, while Series Fusiformes is formed an east-westward horizontal belt-shaped distribution along the south slope of Himalayan mountains. These two series converge partially at the abrupt turn of Yalu Zangbu Jiang and neighbouring Bomi regions. After having made further analysis concerning distribution and characteristics of morphology for each species, it can be seen that this section take assorted xeromorphic characteristics as a means to resist the environmental aridity and frigidity, so that they can grow and multiply under the bitter condition of the higher altitude, they are differentiated very violently, there are conspicuous variances inside of species. The facts mentioned above show that they are still being differentiated. After all, Section Oreocapnos M. Popov is a young specialized alpine group formed during the process of the upheavel of Qinghai-Xizang Plateau. The eastern and southern margin of plateau is the center of distribution and the center of differentiation of this section.更多还原