Many species have been introduced beyond their native ranges and many have become global weeds. Human mediated dispersal has removed the geographic isolation of these species, reversing millions of years of independent evolution. Examples are the Oxalis species in section Corniculatae where several species have become invasive. Here we characterize and formally describe a hybrid between O. dillenii and O. corniculata, which occurs spontaneously in Belgium and Japan. Oxalis corniculata is probably native to Japan, but both species are alien to Belgium and O. dillenii is native to North America. We formally name this hybrid as Oxalis × vanaelstii. Although this hybrid is sterile, it is nevertheless vigorous and perennial. Both parent species grow as weeds in gardens; therefore, it is likely to be more common than currently appreciated in countries where these species co-occur.

中文翻译：

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非天然范围内的Ox浆草和莳萝O的杂交

许多物种已被引入其本土范围之外，并且许多物种已成为全球性的杂草。人类介导的扩散已经消除了这些物种的地理隔离，逆转了数百万年的独立进化。例如，Corniculatae部分中的Oxalis物种，其中一些物种已成为入侵物种。在这里，我们表征并正式描述了O. dillenii和O. corniculata之间的杂种，该杂种自发于比利时和日本。Oxalis corniculata可能原产于日本，但是这两个物种都对比利时不熟悉，而O. dillenii则原产于北美。我们将此杂种正式命名为Oxalis×vanaelstii。尽管这种杂种是不育的，但是它仍然充满活力且多年生。两种亲本物种都在花园中像杂草一样生长。所以，