半夏种内各变异类型主要形态学性状比较研究

Comparative Study on Morphological Characters of Variation Types in Species of Pinellia ternate

目的为半夏各变异类型提供形态学的鉴别和分类依据。方法系统观察并测量各变异类型主要形态学性状,采用多角形图比较其相似性和差异性程度。结果生殖器官中,各变异类型间各性状的差异性较小,但有一个变异趋势,即阔叶类型的雌雄花序长和宽,雌雄间隔,管部长和宽与其它类型相比,数值略小。营养器官中,以叶片长宽比值即叶形的变化最为明显,其它性状在各变异类型间相似。结论叶片长宽比值在各变异类型间差异显著,可作为各变异类型鉴别和分类的依据。

Objective To provide necessary morphologic basis for identification and classification of variation types of P. ternata. Methods Fifteen characters of vegetative organ and reproductive organ were made system observation and survey. Polygon charts were used to display the differences and similarities of characters among variation types. Resalts Nine characters of reproductive organs were highly resembled. However, compared with other types, the type of broad leaved had smaller numerical value in the length of ♀ and ♂ inflorescence, interval between ♀ and ♂ inflorescence, as well tube. One character of vegetative organ that was the ratio of length/width of leaf has obvious difference. Those of others were similar among variation types. Conclusion The ratio of length/ width of leaf was obvious in variation types. In view of it, the ratio of length/width of leaf should take as a classification basis of variation types of P. ternata.