引言巴西橡胶树是三叶橡胶属中唯一已广泛栽培和利用的一个种。它在经济上的重要性,使它在某种程度上变成了各种不同学科的研究对象。直至目前,三叶橡胶属的其他的种很少引起分类学家的注意。这些种的经济意义不大也许只是暂时的,因为与栽培种相似的这些三叶 Introduction The rubber tree of Brazil is the only species that has been widely cultivated and utilized in the genus Trifolium. Its economic importance has made it to some extent a subject of research in a variety of disciplines. Until now, other species of the genus Trifolium rarely attracted the attention of taxonomists. The economic significance of these species may not be large and may be temporary, since these three-leaf clovers