薯蓣属马肠薯蓣的分类修订

Taxonomic revision of Dioscorea simulans Prain et Burkill of Dioscorea Linn.

马肠薯蓣（Dioscorea simulans Prain et Burkill）隶属于薯蓣科（Dioscoreaceae）薯蓣属（Dioscorea Linn.）根状茎组（Sect.Stenophora Uline）^（[1]）278。Prain等^（[2]）根据1928年秦仁昌采自广西罗城县大林山的标本（秦仁昌5319,5335）命名马肠薯蓣,并建立Sect.Illigerestrum Prain et Burkill^（[3]）,将马肠薯蓣归入该组。该组地上茎几乎不分枝,左旋;叶3裂,无毛;雄花簇生成小伞状或总状,花被片呈轮状排列;花药6枚,3大、3小;雌花花被片呈轮状排列,总状花序。

Based on consulting document literatures and specimens, plant introduction, and long-term observation,morphology and other characteristics of Dioscorea simulans Prain et Burkill were anew described and revised. The results show that characteristics of stem above ground twining to left,rhizome below ground,number of flowers in cymule on male inflorescence,fruit reflexed,number of chromosomes of 2 n = 20,etc. of D. simulans are similar to those of species in Sect.Stenophora Uline,but characteristics of growth pattern of stamen,sex of solitary flower,compound leaf and venation,leaf structure micromorphology,and anatomical characteristics and chemical constituents of rhizome are distinctly different from those of species in Sect. Stenophora. It is suggested that Sect. Illigerestrum Prain et Burkill should be restored,and D.simulans is reassigned from Sect. Stenophora to Sect. Illigerestrum restored.